Some unseen effects of extreme cold
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Extreme cold can have unusual effects in some unusual places. It can cause more radon gas to enter homes, and it can kill off tree pests. MPR's Cathy Wurzer spoke first with Bill Angell, professor, and housing specialist at the University of Minnesota, about radon. Then, she spoke with Lee Frelich, who studies forests and is Director of the Center for Hardwood Ecology at the University of Minnesota, about tree pests.
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