"A layer of wood chips limits the direct access the water has to bare soil, slows down the movement of water, and can shield soil from being washed away," says Mizejewski. Bare soil can heat up ...

making it unsightly for a top mulch layer. There may also be an unpleasant odor, depending on the type of mold present.

The concept behind an integrated chip is relatively simple: an entire electrical circuit with numerous transistors, wires, and other electrical devices all built into a single square of silicon.

And in removing those trees, we grind up the trees and we make mulch, wood chips out of them," explained Matthew Morrison, an urban forester at the National Mall and Memorial Parks. “So ...