The Washington Post: Everyone says trees are good for us. This scientist wants to prove it.

Aruni Bhatnagar looked up.

“This tree right here, it’s got a lot of good leaves so you can stick a lot of air pollutants in it,” Bhatnagar, a cardiology researcher, said as he gestured toward a magnolia tree on the U.S. Capitol grounds.

Bhatnagar, silver haired and wearing a black turtleneck, was in D.C. for the World Forum on Urban Forests to speak about his $15 million Green Heart Louisville project — an initiative aimed at showing a causal connection between greenness and human health, and a potential model for U.S. cities looking to measure the effects of their tree planting.

VIEW PDF OF WASHINGTON POST STORY