Is well known. The trees help counter climate change by soaking up carbon dioxide. Now there is a growing body of research to point to many ways of dose of trees can improve our mental and physical health. Here's martha bebinger member station. W. b. you are on how and why the tiny sapling robin williams planted thirty years ago towers above her boston home. I raise this tree when i raised my children and look at this look at that. She says there's something about being near this tree. It makes everybody a little bit happy around here when you're looking for strength you can't do better than looking at a tree and there's evidence williams may will be gleaning any number of direct or associated health benefits a longer life. Bitter birth outcomes lower stress levels lower risk of heart disease. Dr howard lumpkin. Is it the university of washington school of public health. Lower risk of diabetes reduced symptoms of adhd proximity to trees is associated with a ridiculously broad range of health benefits. I wish we had pills. That were this good for health. A few countries notably japan and south korea have invested in a practice known as forest bathing which is spending time among trees as a preventive health measure but prescribing time in nature is still pretty far outside mainstream medicine in the. Us from can says that. Maybe because there's a lot we don't know what doses needed. Do you need to walk. Among trees is sufficient just to look at the trees from outside your window. Do you need big trees or do small trees do the trick we you know. We're not able to tease the forest from the trees. Peter james at harvard medical school aims to answer a lot of those questions. He's merging health data captured by phones. Real time surveys about wellbeing and mood and street. View mapping data to dig into. What's exactly within view. Is it trees. Is it flowers and how those things are related to help behaviors and health outcomes.