Guest: Sharon Doty, Professor in the School of Environmental and Forest Sciences, University of Washington
There are more than a thousand locations around the country that are highly polluted with hazardous waste. They’re called superfund sites, and they pose a dangerous threat to human health if they contaminate surrounding water or agricultural areas. But these sites are really difficult and expensive to clean up. That’s where Sharon Doty steps in. She’s a professor of environmental and forest sciences at the University of Washington, and she’s found an unconventional way to cleanse contaminated areas: poplar trees.