Huffington Post: Mattoon, Illinois, has just become the single most important spot on the globe for Big Coal. There a consortium of mining companies and electric utility companies are putting American tax dollars to work. Building a commercial coal-burning plant that is to have the latest in clean tech. To remain almost carbon neutral the FutureGen plant will use carbon dioxide sequestration. They’re going to pump some of that CO2 underground and try to keep it there. Current cost estimates? The plant …