Star Tribune: Every time a lamp goes on in this country, there’s an even chance that the electricity brightening the bulb was generated at a coal-fired power plant. Within Minnesota, the odds are even higher — 2-1. More than any other source, “King Coal” is satisfying the energy appetites of Americans. But this fossil fuel is also the single biggest polluter. The ash escaping from the stacks at coal plants carries one-third of the country’s greenhouse gas emissions — mostly carbon dioxide — …