The term "leafy neighborhood" came into common use a couple of years ago. It signifies what a lot of people want: some cool shady trees to blunt the harsh urban/suburban experience.
Well, there's a problem there: research indicates that urban tree cover is diminishing, just as the planet is getting warmer.
David J. Nowak studies this and other trends for the U.S. Forest Service.
He joins us to talk about the areas he studied, what he noticed in tree cover, and why it appears to be changing.