A new report says rainfall in the upper midwest is loaded with mercury, which is polluting the region's lakes and streams. The National Wildlife Federation report says rainfall in the Duluth area holds about six times the amount of mercury considered safe for people. Readings in some urban areas like Detroit are about 65-times the safe level. Bill Grant is Director of the Midwest Energy Program at the Isaac Walton League. He says mercury is a naturally occurring metal, but in this case the problem is the result of human action.