Clean Air Act isn't pain free, but it pays off

http://www.msnbc.msn.com/id/43269525/ns/business-going_green/

Piles of coal are shown at NRG Energy's W.A. Parish Electric Generating Station in Thompsons, Texas. It's one of the largest power plants in the United States. The EPA will begin regulating mercury emissions from coal-fired power plants for the first time, the latest in a string of new regulations that has Republicans bent on reining in the federal body.

Many argue we can't afford the regulations that keep our air clean. Not so

**Opinion**

This picture is tough to bear.