19 Burst results for "David Keith"

What is geo-engineering and how could it help tackle climate change?

Why It Matters

09:06 min | 7 months ago

What is geo-engineering and how could it help tackle climate change?

"It sounds like something out of a movie system of satellites controller with a movie with a really big disaster detention for catastrophic weather events global scale a general store but the idea of manipulating our climate in order to survive is a real thing it's being developed by scientists right now and it's called Solar Geo Geo Engineering. The problem is it's risky I'm Gabrielle. Sierra and this is why it matters today should we dim the sky a dire warning this morning from climate experts a UN panel says governments around the world must take rapid action to curb rising temperatures plummet. Climate is now changing faster than at any point in the history of modern civilization very liveability. Our planet is extinct not in ten years twenty years thirty years but right now so solar measuring is the idea that humans might deliberately liberally alter the climate somehow to change the energy balance of the earth the reduce some of the climate change that comes from accumulated carbon dioxide. They can't undo all the environmental risks of carbon dioxide Maybe it won't even undo hardy. Any of them. We really don't know very well but it best it reduces some of them mm-hmm. That's David Keith. He's a professor of both engineering and public policy at Harvard. He's also one of the world's leading researchers on Geo Engineering so I've had a big onstage argument with Al Gore and factors did few years ago. where he I think his underlying position was that it was dangerous? Even talk about Solar Jewish assuring because it would destroy emissions cuts to me the worst way to handle this is to keep the kind of Tabu intact to not bring us is out in the open to keep not talking about it and then to get to a situation. Where even if we don't talk about it some country moves forward to deployment and we have under crisis to make decisions both about the technology and about governance? Today people are starting to talk about Solar Geo engineering a little bit and if you want to know what it is you have have to start at the beginning with climate change. So here goes the most important driver of climate changes energy use fossil fuels coal and gas and oil when they're burned to provide us all the energy that allows one hundred world to work. They put carbon dioxide in the air and that increase in carbon dioxide in the atmosphere makes the atmosphere try or heat and it tends to warm up the climate. A good way to understand this is to think of carbon in the atmosphere as a huge blanket covering birth it traps in the heat the more carbon in our atmosphere the hotter it gets under the blanket and that causes all sorts of changes so the most obvious one is warming warming but it will say melting ice sheets and chicken race sea levels will increase the intensity of extreme storms and rainfall events. All all those collectively will produce a series of human environmental impacts and that's where solar geo engineering comes in. But how does it work. Give me just like a step by step of that process. Sure so in a very basic way we wanna get aerosols of some sort into the upper grabs fear. Probably with specially designed planes. This is achieved. SUCCI is the research governance and public engagement fellow. Hello at the Union of concerned scientists. They would admit these aerosols which then stay in the atmosphere for on average of a year or two and then we would need to continue that process again and again to maintain the temperature. We have reduced so aerosol like hairspray basically but a different different chemical compound. Okay so these planes would fly up super high release chemical compound that would then make a cloud essentially but ah more dispersed layer that would cover the whole Globe and then do what and so that layer would reflect sunlight. The idea idea here. Is that when we bounce sunlight back into space we reduce the amount of incoming heat. So you'd have to keep doing this over and have to keep doing this has it's been tested Ed. This has not been tested. The only test we have is a natural analogue of a volcano. So the the most recent volcano that exploited that got aerosols into the stratosphere was Mount Pinatubo Nineteen ninety-one and we notice that there was about a half degree of cooling that lasted for a few months so people just look at that and they were like. Oh what's do that. I think people like. Oh that's really interesting. I think we should look into that further and then that that research led into this space as a potential way to help cool the planet. We can't just wait for volcanoes to erupt so scientists are trying to figure out synthetic ways to do the same thing and aerosols in the stratosphere are just one of the options there other ideas of manipulating cirrus clouds ways as you could reduce the amount of these thin high clouds which act as heat trappers. puzzles to modify Rian stratus clouds. Kind of Lok Lousy off say say the coast of Seattle to make them a little more effective and finally at least in principle you could imagine humanity constructing some kind of reflective shield in space between between the earth and the sun aside from these methods. There's another one that involves recreating woolly mammoths. Yep you heard that right woolly mammoths. Another plan involves spreading. Sand oversee is to keep it from melting but the one method. That's getting the most attention. And the one we're talking about today is atmospheric aerosols aerosols and a big part of this conversation is risk. Scientific risks are not willing understood. We've done a lot of modeling. The space face in there is general ideas of how it could affect precipitation or extreme weather but it's not a robust understanding and especially at you know a small enough enough scale for different countries to know how it might affect them. So what are the chances that messing with our climate this way will have side effects and unintended consequences on says it's one hundred percent certain that something you do with this scale we'll have side effects an unintended consequences. Anyone who thinks that this is some magic fix that will perfectly GLI reduced climate risks and work exactly the way we expect anybody who thinks that is not. I think we can do lots of research and we could learn a lot but at the end there will still be lots of unknowns. Are there any known risks already. Oh lots of known risks so it could deplete. The ozone layer could change the circulation the stratosphere it could cause air pollution. Because we're talking about adding aerosol so the atmosphere we know those are pollutants by blocking sunlight. It could reduce crop productivity. There is a big range of risks for each of the risks. I said they're now quite a few scientific papers. Have begun to really look at those quantitatively and for each the rest. I said it looks like based on early research that the actual scale of those risks is pretty small compared to the benefits of reduced harms through the reduction climate change. But I wouldn't leap inclusion that we know that the risks are small compared to the benefits. I think we can say will call on its is. There's enough reason into believe it could dramatically reduce human. And if I'm honest is century that it deserves serious research so what. What are the chances that some regions will suffer more from the consequences of Geo engineering than others because if someone just decides that they're going to do it it's not just gonNa Hover over one country it will affect the entire world so we know for sure? There are ways that you ensuring could be that were produced hugely equal destructive destructive impacts so for example you only did it in the northern hemisphere and reflected sunlight in the northern hemisphere. Put ourselves in there and not in the Southern Hemisphere. You would shift the band of rainfall and the tropics with big big impacts. We know for sure that would be destructive. The evidence is that if it's done in a way that is globally uniform. You aim to have roughly the same because radio forcing same amount of sunlight being reflected almost almost everywhere north to South East to west. If you do that and if you do it in a way where you're not doing too much you're using it to take the edge off the the risk the pain gene for Co two in the air emit circumstance. The evidence for current models is that actually no major regions are left worse off in all regions have significantly reduce describe at risk. So you just do a little bit Geo Engineering. Not you know a ton. Well yes. The dose makes the poison

Solar Geo Geo Engineering Geo Engineering Solar Geo UN Mount Pinatubo David Keith Sierra Seattle Al Gore Harvard Professor Southern Hemisphere Union Of GLI
Fresh update on "david keith" discussed on The Fix-It Show with Tom Feiza

The Fix-It Show with Tom Feiza

01:23 min | 13 min ago

Fresh update on "david keith" discussed on The Fix-It Show with Tom Feiza

"Home performance with Energy Star Eastern Regional manager He's sitting in the dark because he's conserving power. Is that true? Pretty close, like I've that man. I bet you are, like Mr Efficiency. We do have a call. We got to get to real quick Callison economy. Okay, Cal. Good morning. Hey, Good morning. How are you guys doing? Good. Hey, Good, good. Hey, so been working on my basement floor got family of floors above from Menard's. And I tried to match up. It's I had a flood of my basement about six weeks ago and and just just having a really hard time with it, and I got these floors that I'm trying to put together and I get about the fourth row, Fifth row tap it in and then two or three roles before that it'll pop out and it's not a lot, but it's a little bit. And you got to break it all back and fix that one and keep going. And then you get keep having the same problem And just wondering if you know David has ever Had that issue before any recommendations that that he might have Thank you. Yeah, so I I can't say that I've ever installed of floating laminate floor. But that's some of these floating laminate floors. You really gotta stand top of them, Tio, so that so that they don't move as you're installing them or if they're interlocking. You got to make sure they stay interlocking. I can imagine that could be fairly difficult at times if that's not what you do, but it might also point to the quality of the flooring. That you're getting. I'm not tryingto necessary grip on a product. But sometimes you do get you do pay for so maybe look at a better product you go Think, Cal. Thank you. David Keith Williams. We energies home performance with Energy Star Eastern regional manager Keith as we wrap things up, Let's talk about the two of the incentives that you have. One is theatrical insulation. Let's talk about that first. All right, well, we have a $400 incentive for attic insulation. If that's tight in conjunction with an energy assessment, where full really performance institute certified going analyst evaluation is done. There's an additional $500 incentive so you could get the attic, insulating air seal to one of our trade allies and ham up to him on a $900 incentives. The pain towards the cost of that. Nice and then the whole house insulation. Whole house insulation will. Then there's senators do wall insulation is additional $300 that go to that. If you do still box insulation foundation insulation, there's another $100. Go to that incentive, so that just keeps adding up based on what type of improvements get done, So there's there's preexisting conditions that happened met near the insulation levels have to be low or none. And then have be improved to the levels that we're looking for, and that would qualify for those incentives, and I have no nice A lot of times. I see none in the in the steel box, and that's like the biggest Area of he lost Keith Williams. Some home performance with Energy Star Eastern Regional manager Courtesy of we Energies. Thank you for joining us. We've learned a lot this hour. Thanks. Thanks. Keep. Thank you very much to let me out. You appreciate that.

David Keith Williams Energy Star Eastern Regional Energy Star Eastern Regional M Mr Efficiency Regional Manager Menard TIO Analyst
"david keith" Discussed on The Adam Carolla Show

The Adam Carolla Show

03:56 min | 1 year ago

"david keith" Discussed on The Adam Carolla Show

"Brand new episode of Good Sports Damasec here Adam Corolla over there ace yesterday. I wanted to bring this up to you. You were talking life and death stuff and we got <hes> you know in general sense some good advice for for all the for all of us out there listening but a real life tragedy sweetpea whitaker passed away over the weekend got hit by a car. It sounds like I didn't get the full details of it but <hes> you is a fight fan. <hes> must have some thoughts on where sweetpea ranks as among his professional peers sweet A._p.. Pernell whitaker had some of the best hands number. I mean that guy's hand speed. You didn't fight him. Razi was that you got in the ring with when you went over to New York City. No Oh <hes> CRONK IN DETROIT. I don't remember where you know that was gleason. 's In New York and the guy I got in with. I don't think of him in. I'm sorry I should look that up. I thought it was sweet pea for some reason but anyway no god I it escaped me. I'll think about now the the way we'll be able to find this. Guy's name is this boxer turned actor and he was he was he he was a good actor. He was in he was in member every three years. They'd have one of those movies. Come out from the Military Academy. The young guys military academy you know toy soldiers soldiers keep coming. They love that we're due for one of them or overdue for Military Academy kind of thing. This was early Eighties Military Academy movie with Oh God. Actually the guy was in both those moves the guy his name is all around my head right Abe it Keith or Keith David David Keith was in officer and gentleman and he was in this movie called like inferno zone or something like that had a weird head weird weird sound to it but this boxer and I'll figure out who this boxer is in a second he he was he was a dominating unbeaten Olympic gold medal probably middleweight Terry Claybon now Terry clave on my boxing coach. This guy is a guy who I worked worked out within a man show bit but <hes> sweet pea had great hand speed. I don't know Gary hooted sweet pea beat who were his. He was dominant first of all one of the great nicknames that have hurt Sweetpea Whitaker's excellent yeah but he would also do that crouch when I mean that extreme like he would go. I don't even know how to describe it almost crab like how far he would squat down to avoid punches. Hunches which was <hes> bizarre to look at great defense but amazing hand speed he was an Olympic yeah catalyst this well. I do believe also a great name which is <hes> Cornell. Personnel didn't didn't really need the nickname and the Guy Lords of discipline. That's the movie lords of discipline and then you will dylan find out the cast of that Keith David or David Keith Ser- to I don't know what which guy and talk about your same name game knows are two very different human beings who both chose the profession of of acting link or did it use them lords of discipline nineteen eighty-three..

Guy sweetpea whitaker gold medal Military Academy Keith David David Keith crouch Keith David Eighties Military Academy Adam Corolla David Keith Ser Keith New York City DETROIT Razi New York Gary Cornell boxing dylan Terry Claybon
"david keith" Discussed on KQED Radio

KQED Radio

01:37 min | 1 year ago

"david keith" Discussed on KQED Radio

"Or aviation kerosene. Choose your grade that fuel didn't come from the ground all the carbon that you release burning it you took from the atmosphere when you made it so in the net, there's no carbon emissions, and that's a way to help decarbonised. So what if we don't decarbonised and reduce greenhouse gas emissions fast enough to avoid dire consequences, David Keith is leading research into a drastic measure to turn down the global. Thermostat. It's called solar geo engineering, the idea inject large quantities of sulfur dioxide, or maybe another aerosol into the stratosphere using high altitude aircraft, this should lower global temperatures by reflecting sunlight away from our planet for how it sounds like an idea hatched by JAMES BOND villain, and David Keith is keenly aware of that Jewish airing seemed like a bit of a crazy idea. But there was a taboo, and I think to boozer unhealthy, and my view was we should understand it better to see just how crazy it really is. Indeed, he's been exploring this idea since nineteen eighty nine and over the years it's made him a bit of a scientific pariah. Senior colleagues would tell me this would ruin my career or people would kind of like wanna move away from the elevator. This topic was just toxic and the mainstream climate science community. Just didn't want to talk about it. He may not have had scientists on his side, but nature has been running solar geo engineering experiments for millions of years. In.

David Keith boozer JAMES BOND
"david keith" Discussed on The IVY Podcast

The IVY Podcast

02:04 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"So that's i i'm having try to answer that question where basically at the end of an hour but we end up with questions all through which i'm very happy with how much more time realistically do we want okay so carbon removal as is often called is also been a bit of tabu subject and and there's been almost no research budget so the uk for example just authorized a tiny like one million pound for search budget for one particular interesting set of ideas for carbon removal called alkalinity mission and that's one of the few research projects like that in the world is one particular senator algae's which is the idea that you could make industrial machine to directly capture co two out of the atmosphere and make concentrated co two and so there are couple companies pursuing that seriously one of which i found it so let's go carbonate sharing the other big one is called climb works they're both still tiny stars but they're not tiny tiny life were sort of forty employees and there may be sixty or so and and the central market that we carbon hearing which is completely unrelated to my academic work at it's based in british columbia canada the central thing we are sharing driving force actually not lars go rubles from the atmosphere it's using sheep solar power to combine with two and make fuels so we basically make low carbon or carbon neutral fuels to save power aircraft under a carbon constrained janda carbon constraints in a way that competes with other ways to make lowcarbon fuels one way to think about as we do the same thing that biofuels do as we take sunlight and or to the atmosphere will make fuel but we do it with about thirty times less land than biofuels so with a much smaller constraint industrial process and they're certainly ways that it could get cheaper but i think there's some industrial processes that get cheap very slowly so this gentleman i'll just finish on that said we live in an exponential age that feels true if you're in the it industry but if you look at a whole bunch of the.

uk senator one million pound
"david keith" Discussed on The IVY Podcast

The IVY Podcast

02:02 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"In each case i'm showing you two times to miles controls basically mouth things have changed when you do increasing co two so let's just take sat a service air temperature so what this is showing you is is that if you look at all the land braced grid points in this model and this is the distribution of the change in service temperature so maybe you may have heard that if you double the atmosphere you warm the overall climate up a couple of grease centigrade that's the number uc here but this shows you the district this is saying that something like one percent the worst the worst one percentile is actually warming up sort of four and a half degree centigrade which for global average chain for annual average changes huge change in climate and then the you know the the lowest percentage here's the distribution this is this is just too time co two and then the blue is when you do time co two and you do enough solar jewish nearing to cut average temperatures in half so of course the average the median ear is half as big as this one but what it's not obvious so i told him that the average but what you also see that the rangers reduced a whole lot the extremes reduced law and that's true for service air temperature but this is service temperature worst our over a year says the absolute max over a year and that's probably a much better measure of a lot of human impacts if you think about the big heat waves that are really killed people in asia is a good measure of that and you can see that ciller jewish in really reduces versus a lot this is precipitation evaporation which is basically the amount of water available for our culture for ecosystems and again solar change during his things back to pre industrial so that really appears to be true for every one of the major climate variables alas what is extreme storms or his five day maximum precept and that's surprising and we've also looked at what it looks like leisurely so you one complicate into interpret map and then i'm gonna kind of go back to more more general conversation this divide up the world had a bunch of these standard regions that the intergovernmental panel.

rangers asia one percent five day
"david keith" Discussed on The IVY Podcast

The IVY Podcast

02:12 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"Like in five minutes what i wanna do is say say give you one more bit of science and then i'm gonna switch more the politics of it so it is i think not an overclaim the say that this could be done to stop warming and it could be done cheaply so the world's negoti about how to get the one point five commitment paris you could use this but that doesn't mean it's a good idea tall because what matters is not global average temperature but the extent to which local climate changes local changes in extreme precipitation or or or moisture availability or extreme storms how much the doing this actually reduces the impact of those things at perfectly possible reduce the global average temperature but this is being flip make half the world ten degrees colder and half degrees warmer and that would obviously be bad for everybody so the point is just the statement that it does global our schamberger doesn't tell you it's a good idea what you do is run good climate models and really trying to understand what the impact of doing it would be so i'll show you some relatively new stuff i'm gonna skip some things show you some slides it'd be the most technical sides probably so this is awesome results from a state of the art climb model it's very very computational expensive the physical fluid dynamics lab bronze this model actually does tropical storms hurricanes from first principles pretty well or not hand coded it really does them right up to kind of category five hurricanes and gets a pretty good version of the current climate distribution of of hurricanes which is quite amazing climb models couldn't do that twenty or thirty years ago and i won't go into the details but it does a much better job of getting north american precipitation is extreme precipitation the us and this is the upper left is what observations are what extreme this tradition of extreme precip of are on the us today this is the maximum one year returning event for trine precept and this is what a low resolution model does which is pretty lousy and this is what the fancy model does which is kind of nice so what i'll show you really to key technical slides what this is.

paris us five minutes thirty years ten degrees one year
"david keith" Discussed on The IVY Podcast

The IVY Podcast

01:47 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"Yeah i'm not saying that we should just trying to be clear about it but but the key trick is that a little droplet or a little dust particle of an aerosol is much more efficient scatter than micron foil and it lasts longer up in the upper atmosphere and the real little part of this is a fun science experiments you've all seen clouds like this you seen clouds appear at a blue sky how the heck can that be true the cloud that appears at a blue sky has the same amount of water vapor for some kinds of clouds as the sky did before it and if you took all the water vapor and cloud gathered to get into ball you just have a ball of water which would fall and it wouldn't be white and reflect and if you have all that water is vaporized it wouldn't be widened reflect so the same amount of water vapor if you gather together and little tiny droplets is much more reflective than if you got together in one day swimming pool or you have it as a vapor the lesson is that reflecting sunlight has a lot to do with the way you organize stuff and if you organize into the little droplets about as big as the wave of light it's a really effective reflector and that's why clubs do appear like that out of a blue sky so you have to make really smart small droplets droplets that's a human hair you make drop us at about half a micron and size but but nature does that and we can do we do it as pollution already and these half microparticles act like little mirrors and so back to the same thing if you want to put calcium carbonate or sulfur things we've thought about into the stratosphere and he wanted to do that same two percent of the irs area you only need to put something like five or ten million tons a year into the stratosphere and that's not hard.

irs ten million tons two percent one day
"david keith" Discussed on The IVY Podcast

The IVY Podcast

01:31 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"'cause stop the entire world warming and you should be skeptical and i'm going to give you a little the little part of this as a science lesson to say why era souls might be particularly kind of high leverage to alter the climate so so let's say you wanted to offset the whole radio forcing of doubling co two in the atmosphere so you've got doubling in the atmosphere and you wanna do something reflect enough sunlight to bring global temperatures back to where they were before you double it turns out you need to coincidence reflect away about two percent of the sunlight so that means you need a mere which covers about two percent of the earth more or less and so one way to do that would be to cover this thing with mylar foil and that the numbers are right so this is two percent of the earth about ten million square kilometers and so you could say okay i'm gonna cover it with foil what would that cost so it's just just just a order manitou calculations give you sense of what's hard and easy so if you want to cover the us with mylar foil you know you go look how thick mylar foil is i twenty five microns thick so needs like seven hundred million tons of mylar foil and maybe it lasts a year because it degrades on the ground so you gotta make maybe you know several hundred million tons a year of mylar and that's like more than the world's plastic production is it real aside from obviously the lunacy of covering the us actually be physically economically hard to do.

us two percent ten million square kilometers seven hundred million tons hundred million tons twenty five microns
"david keith" Discussed on The IVY Podcast

The IVY Podcast

02:00 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"Yeah so there's so this is often called a tipping point i think there are lots of individual things where the impacts are non linear so there are lots of cases where certain kinds of crops will only grow in certain regions of climate and you may find some on the there's actually i think not much evidence that are some overall single threshold so politically many of you will have heard about the paris treaty commitment to one point five degrees c and or two degrees thirty i think thoughts of good reasons why people make treaties that have specific numbers in them but i think it's important say there's not a scientific consensus of their shum sharp threshold at those regions i think the general scientific understanding is there more report in the more risky if gets the rhys certainly grow faster than linearly and they are uncertain that's kind of the brutal summary of the science and short let me say something about why the policy is so hard so again for air pollution you cut pollution in the problem goes away it's not to say it's easy to couples i mean the political battles that were fought say too in los angeles clean up smog the political battles around the clean air act we're no joke the clean air act implementation this country cost close to one percent of gdp and had enormous benefits i mean people your generations living a year and a half longer so clean air act so that's an us average i mean if it was l a it's much much bigger delta but the reason this is hard is that when we make policies to cut emissions we gradually celebrating structure of low carbon infrastructure building solar plants or whatever you like the emissions reductions grow with accumulation of infrastructure sort of one integral and then the concentration reductions concentration's mount in the atmosphere which is out warming is a second integral the net effect of things it's very slow from the moment that we have serious climate goal which i would say is not quite here yet but it's better than it was.

rhys los angeles paris five degrees one percent two degrees
"david keith" Discussed on The IVY Podcast

The IVY Podcast

02:00 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"This topic isn't new so it's easy to think if you're a lot younger than me that the climate problem has sort of been visible politically visible scientifically for say a decade but it's actually much much older so this is an article that says all the same stuff that you read if you read climate articles and your recently it really isn't that different except it's from nineteen fifty three and there's could find articles after that this was reporting on the first big research from the us air force you physics lab the first accurate calculations of what we call radio transfer in the atmosphere the first major report that went to us president that had kind of the modern version of the climate story about the cumulation of co two and had a rough modern calculation of how much things would change that calculation went to president johnson when i was two so this has been a long problem it's not something people are just been thinking about for a decade or two and progresses in some ways been very slow though there really is progress now another things about is uncertainty i can spend the whole expert on that i'm just going to do this one slide but i said that the amount of warming was proportional to emissions that's true pretty high coffins it's true there's proportional but the proportionality constant that is how much warmer you get for a given amount of emissions is actually uncertain to like a factor of three so that means that for the best effort of all climate side is around the world for decades and i've been sitting doing four trying to climate models myself we can't tell you with very high accuracy how much the climate will change we just have to make policy in the face of that answer so there's this this is an old graphic from mit that i think nicely illustrates the fact that it's like spinning roulette wheel for given emissions directory under say businesses usually you spend the wheel and you're pretty likely to get very warm emissions your won't get quite so warm but whichever one you do their substantial uncertainty and even if we cut emissions a lot still.

us president johnson
"david keith" Discussed on The IVY Podcast

The IVY Podcast

02:17 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"Atmospheres last lied was about how much we're putting in each year and this is about just the total in the atmosphere and the toll atmosphere is gone up a lot four hundred parts per million atmosphere compared to eighty and almost all of that was coal gas and oil so you may have heard about rainforest burning yeah rainforest burns but also rainforest grow and the net effect of all the change in land use was more or less euro so the dominant effect by far is simply humans pudding co two in the atmosphere so this part is something we know with pretty high accuracy so this point we know the carbon budget to ten twenty percent very well the next part the hard part is how much will the climate change as a consequence of co two in the air how big how much does how much is it warm up as we put two in the atmosphere that we know a lot less well but we have lots of reasons to believe that serious and i can give you lots of sense but i want to give you the kicks you way back in time so by the end of this century if we did nothing to slow it down we will have say thousand parts per million of damase fear so something like a factor three more than than when the industrial age started give you a sense of that that's happened before so this is a time directory of the last fifty million years and there were periods before something like fifty million years ago and the paleo saying using thermal maximum is called yet one second where where we had co two of a few thousand parts million in the atmosphere and odds on just one second and there's nothing particularly right or wrong about having even amount of co two atmosphere but the issue is about rate of change so if humanity does what we're doing now we will bring you back to the level that it was in the atmosphere safety million years ago on a timescale of a human lifetime or to something like one hundred thousand times faster than it took to to remove the co two after that poc throw maximum and the worry about climate change is not because we believe this is intrinsically just the right climate for the atmosphere it's that the locations of our cities on the coast this one.

fifty million years one second million atmosphere ten twenty percent two atmosphere million years
"david keith" Discussed on The IVY Podcast

The IVY Podcast

02:02 min | 2 years ago

"david keith" Discussed on The IVY Podcast

"The natural equivalent so there is a natural queant co two does move carbon moves from deep underground through save all kano's and through cps where oil and gas to the surface that's how we ridgely found oil and gas and lots of places and you can think about what's the relative size of those two things so the most basic way thing about climate changes how big is what humans are doing compared to what the natural background is so i'll show you the answer the second but think about it is it are we sort of roughly big tent big ten times as big so the rough answer is that worth thirty times as big and you could get forty and get different numbers but the answer is the rate it what humans are moving carbon from deep underground to the the atmosphere is something like thirty or forty times as much as the natural background does it so we're overwhelming completely and what that means is we're driving up the amount of co two in the atmosphere with consequences that are climate change we can talk about so some basics about the actual flux of carbon to the atmosphere it's huge each of you on average and you're maybe more wealthy than average average a developed country like this account for something like twenty tonnes of co two per person per year so think of that as being fifteen cars the lot and if you could see it we might think about it differently but it's an invisible thing and it's not something directly dangerous to people only indirectly through causing climate change so this gives you some sense of saint from nineteen sixty till now of what's happened to global carbon dioxide emissions the last actually three years before this one they were flat and a lot of people thought that that was the peak and that maybe work on energy efficiency and clean energy had stopped the rate of co two rising it's possible we're getting close to there but in fact this year was higher again and my guess is we've got a ways to go up in emissions even with efforts to cut emissions to substitute and this gives you some information about how carbon is change since eighteen seventy so what the the amount of co two.

ridgely twenty tonnes three years
"david keith" Discussed on WNYC 93.9 FM

WNYC 93.9 FM

02:02 min | 2 years ago

"david keith" Discussed on WNYC 93.9 FM

"That means in our boiler we have biomass and not conventional fossil fuels to that's plants or things that have grown recently those plants have removed carbon dioxide for me atmosphere as they've grown so when you burn news in a power plant often they're considered to be carbon neutral because you just release what you scrubbed from the atmosphere recently with carbon capture and storage you go one better because the biomass has removed see what you from the atmosphere in the last few years if you then into the subsurface safely you've removed from the atmosphere so you get nature to whole co two out then you burn those plants and then capture that co two and then hide it somewhere you're listening to crowd science from the bbc world service so far in this show we've looked at industrial machines that capture carbon dioxide either from regular air or from the flue gases of industrial plants there are whole host of other ways people have come up with to get co two out of the atmosphere we don't have time to go into all of them but here's a rundown this putting on into the oceans which encourages plankton to grow and suck up zero two and that carbon get stuck in their bodies which eventually end up on the ocean floor there's enhanced weathering of rocks rocks naturally draw out of the atmosphere through chemical reactions with their surroundings and people are looking into speeding up that process and then this boy hr stopping plants by degrading by turning them into charcoal and mixing that into the soil where it can stay for tens of thousands of years let's get back to the co two sucking machines we've seen how they capture the carbon dioxide but what do you do with it david keith mentioned tony carbon neutral fuels and in the first climb works plant in switzerland they're piping it into a greenhouse and using it to grow cucumbers but that's not going to.

switzerland bbc david keith
"david keith" Discussed on KCBS All News

KCBS All News

01:51 min | 2 years ago

"david keith" Discussed on KCBS All News

"A few low eighties it'll get even warmer tomorrow then a little bit model a little bit more moderate on friday saturday and sunday sixties and seventies same story for monday traffic and weather together on the eight so an all news one of six nine am seven forty kcbs it's six twenty this week bay area company is heading to alaska to lay the groundwork for an effort to try and stop a frozen lake from melting it's an example of one of many projects that are part of the emerging field of geo engineering which envisions large scale efforts to fight climate change by directly manipulating the natural environment harvard physicist david keith is an expert in the field and author of the book a case for geo engineering he joins us live this morning on the kcbs ring central newsline mr key thanks for joining us this morning can you give us an example like for example the lake that i mentioned how are they going to stop that for melting i really don't know much about that project and i've got to say i really hope it's not a company as you said i don't know that for sure but i think that it's quite important that because of the potential risks and uncertainties with these research it not be done by companies so let's talk about even a scientific experiment who makes the rules around whether we sprinkle silica here or drop iron ore in the ocean there in hopes of cheating some sort of you know better goal well so there's lots of ways that we make the rules they're environmental rules that manage releases materials there are rules that manage the way scientist perform experiments outside ranging from human subjects rules to various approvals that necessary for releases of environmental materials into the environment the trump administration has not gained a reputation as far of being a pro environment shall we say has that caused scientists to become more creative and and try new things to try and stop climate change.

david keith scientist alaska physicist
"david keith" Discussed on KTRH

KTRH

01:39 min | 2 years ago

"david keith" Discussed on KTRH

"Bear for case in so i introduced a law that all hope to get past year in it's called the environmental modification accountability act and i'm going to the geo engineers and clouds eaters to prison it to them i've already done this to kim called dare and david keith and i got their responses kim called dera says whether warfare is not a thing david keith however said jim this is a great idea in fact i will help you lobby for this and i've got i received the russe support of two other geo engineers so far in getting this law passed were we can actually get some accountability get some transparency so i'm going to this if you guys can support me it's a climate viewer dot com slash a m s unball i've already got the supported david key than a couple jia which near the my pocket i'm going to go talk to the geo engineers there and hopefully soon meteorologist the head of the national weather service and a whole bunch of other p people are going to be there got god emmy award winning a videographer jiri day going with me uh jerry day dot com and he's gonna be videotaping me interviewing them insane look we the people of the internet have had enough we know what you did last summer it's all weather mild weather modification history dot com heat here 10 technologies to owned the weather today infographic god made in his face now we want you to stop doing this without telling people before you do it because we know you're not gonna stop.

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"david keith" Discussed on True Crime Brewery

True Crime Brewery

02:08 min | 3 years ago

"david keith" Discussed on True Crime Brewery

"Right so i'm thinking let's look at the share information had come in about them having sex in a park but anyway on the morning of july 19th police followed michelle as she and david keith took a test drive of a new car the left a deposit on the car now bank records later showed the michelle withdrew 16000 from her account that day here now police were there we michelle paid cash for the car in david key drove it off the lot afterwards michelle met with kevin matthews at a restaurant she was seen laughing crying in the to seemed to be in a serious conversation kevin kister several times and at one point he wiped a tear from her i two hours later michelle's in the new car parked with david key the window is fogged offer but police could see david lying across the backseat without assured on and he was moving in what looked like a sexual motion that just growth needs more than growth slows police were working the investigation michelle took on another boyfriend this is a guy named jason kalin so he knew david key from jail and david introduced two new michelle jason had no place to stay when he is released from jail under driving fence and michelle welcomed into her place i'll share your beverage meet napoli scott warrants to listen into cabinet michelle's call so this was helpful and it became clear that the two were still involved they continue to book hotel rooms and spend time together so they're not even trying to be discreet from how now detectives also spoke to kevin's coworkers who told them about michelle and david's visit to the shop on the day of the murder cermis shows clearly sleeping with david key as well as jusen cologne so in her true of kevin matthews who police stopped david for trafficker fences brought him in for interrogation.

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"david keith" Discussed on We'll See You In Hell

We'll See You In Hell

01:43 min | 3 years ago

"david keith" Discussed on We'll See You In Hell

"Uh who plays that what's the actor's name the plays the guy that makes it to the end besides kurt russell kiki david yet ab not to be confused with david keith who was also an actor true store keith david when he goes he goes duck do you believe any this hocus pocus mumbo jumbo here i isla i just love that he is referring to alien life forms as hocuspocus yeah yeah it also made me laugh really hard when he would test the blood which is like such a great great scene amazing goes through and tests the needle on the blood and then how each new person is now untied from their chair and like standing with him it's just there's something so funny by the way that was cut right is deemed condie the guy who shot lic back to the future and shirt like it's an amazing looking movie gdp or the editor dp amazingly shot did i say editor well you were to sing away was cut so i didn't know if man arms and two different the i love that scene and that to me is one of the best twists in the entire movie uh when you realise kurt russell has killed two men that are innocent yeah and we're not infected right um but it's because everybody's losing their shit my friend dan pointed out a really great point about the prequel which i mentioned earlier which again it's soup it's inferior but it's an enjoyable film it deserves more than 33 percent i think earned on ron tomatoes but he said one of the things he didn't like about it was that it wasn't an allmale cast and he said because one of the unspoken while the heated me that way he said one of the unspoken.

david keith keith david editor kurt russell dan ron tomatoes 33 percent
"david keith" Discussed on KTRH

KTRH

02:50 min | 3 years ago

"david keith" Discussed on KTRH

"Zero pediatric yahoo dot com well neil young who dark the thing is you truly believe i do and i thought i hey to get your fellow but i learned from year and then i witnessed stuff i truly believe that that he he'll and giving thing is going on right now you you you mean the mit geo engineering stuff or or yeah like what spraying air so i yeah global deming they're doing global doing i i can't even show you the they they wanted to do this geo engineering experiment in fact suv i can find is here no harboured given the green light to pursue a geo engineering experiment that will expel aerosols into the atmosphere to block out the sun in an effort to halt socalled global warming yeah yeah well i truly i truly believe it's happening because and i wanna start paying any more about here on your show the online you'll get in travelling stop talking i won't get in trouble i won't get in trouble i'm telling the truth i'm i'm trying to let you know if i hadn't heard back and then a cup we look everyone even though we talked we talked earlier about david keith when i was speaking of a cab summit i talked about that david key plans to use ten gulfstream jets to spray twenty five thousand tons of liquid sulphur gas into the since fear it one bit wants to use planes to dump twenty five thousand tons of liquid sulphur gas into the atmosphere now we're told the campaign trail zone existed david keith wants to use tan gulfstream jets to spray twenty five thousand tons of liquid sulphur gas into the atmosphere be that did you get that it's tens gulfstream jet's five thousand tons of sulphur gas into the atmosphere you at all blake camp drowsy exist i'm going to tell you that guy by the name of david keith harvard has gotten the goahead to usd ten gulfstream jets to spray twenty five thousand tonnes elected so far the atmosphere i hope you heard me because i don't want to say it again okay go ahead okay i mad at me hell no go ahead okay well why okay i like having a crayfish ak jerry are you ready in riyadh on the internet fine but nobody in real life who knows any and they think you should be your lock them if you talk about it do.

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