Discover Magazine: Can Trees Heal Heart Disease?

Volunteers buzz around the front lawn of a Baptist church in Louisville on a bright October morning. Sporting navy T-shirts with the words Citizen Forester emblazoned across the back, they divvy up spades and shovels, grab buckets and hoses. Behind them looms the church’s imposing white-columned entrance and a sign that declares, “Prayer Works.” Across the street, a row of small clapboard-sided homes stretches down the block. A pair of dogs bark furiously behind a chain-link fence. Then everyone turns to the man in leather loafers and a linen suit coat. His ambitious idea — one that may or may not work — is the reason they’re here.

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