Beaver Boom Dams Up Pollution Control Projects
Once nearly extinct in the East, beaver populations are booming. Their comeback, however, is creating complications for storm water pollution control systems, which beavers love to dam up.
Stephanie Boyles Griffin, director of wildlife response for the Humane Society of the U.S., is convincing governments to use devices called "beaver deceivers." They foil beaver dams in a way that does not kill the animals.