While saving the Amazon grabs headlines, the trees right outside your front door shape your life in important ways. The more trees in your city neighborhood, the less crime, the fewer prescriptions for antidepressants, and the lower rates of asthma, childhood leukemia, and other immune diseases. These leafy giants affect everything from healthier newborns to longer life expectancy to higher property values. Geoffrey Donovan, an urban forester and economist with the U.S. Forest Service, joins the show. His groundbreaking research over the two decades is reshaping how urban planners and policymakers think about the essential public health and economic role of trees in city life.