OpenTreeMap is helping cities figure out where all the trees are, so they can better judge the environmental and public health impacts of a well-planted city. Here’s a hint: The impacts are huge.

Last fall nearly 20 Calvin biology students went sleuthing on campus, meter sticks, notebooks and GPS devices in hand. The goal? To document every tree of at least five inches in diameter on the west ...

Scientists from NASA's Goddard Space Flight Center in Greenbelt, Maryland, and international collaborators demonstrated a new method for mapping the location and size of trees growing outside of ...