Lest we forget:
"Advancing the development of clean coal technologies is an important part of President Obama's strategy to develop every source of American energy and ensure the United States leads the world in the global clean energy race and continues to take advantage of domestic resources here at home,” said U.S. Energy Secretary Steven Chu, 2012
Indeed, one of the great myths in our ongoing energy-environment discussion is that only renewable energy systems are evolving. The reality, of course, is that fossil fuel-based technologies are constantly improving as well. Our use of fossil fuels is always becoming more efficient with systems needing less fuel (feed) to generate more energy and becoming cleaner by emitting less greenhouse gases.
Perhaps coal is the best example of this fact.