Dear EarthTalk: What were the environmental impacts of the huge coal ash spill in Tennessee this past December? — Dave S, Lynnfield, MA
Environmentalists’ call for an end to the age of coal-one of the dirtiest and most common of all the fossil fuels we now use-took on new urgency this past [...]

Dear EarthTalk: As I understand it, coal that is used to fuel power plants and other industrial activity is a key culprit in pollution and climate change. So what is “clean coal” and is it really? — Matthew Oliver, Minneapolis, MN
The term “clean coal” describes various processes that remove pollutants from coal, our cheapest, most [...]