During the 20th century, coal was a cheap and reliable source of electricity. Today it’s relatively expensive and highly polluting. The shift to cleaner, less expensive renewable energy is rapidly underway, and it’s happening faster than anyone expected. Our nation’s task now is to manage that transition in a just and sustainable way so that people living in "coal country," who made sacrifices to build our economy, are not left behind.  Read the GreenBiz article here.