Why planting more trees is one of the smartest things a city can do
A growing pile of research suggests that planting more urban trees, if done right, could save tens of thousands of lives around the world each year — by soaking up pollution and cooling down deadly heat waves.
That’s not all: Because the trees would cool neighborhoods significantly, many households could end up using less energy for air-conditioning — reducing electricity use by between 0.9 and 4.8 percent in some cities and helping slow the pace of global warming. They can also retain storm water, boost real estate values, and may even have important mental-health benefits. Plus, they’d just look nice.