Associated Press: More than 100 million people living in 46 metropolitan areas of the United States are breathing air that has become fouled with too much soot on some days, and now those cities have to clean up their air, the federal Environmental Protection Agency said Monday. The EPA added 15 cities to the sooty air list, mostly in states not usually thought of as pollution-prone, such as Alaska, Utah, Idaho and Wisconsin. That probably is because of the prevalence of wood stoves in western and …