clean coal technology
Not a real thing, see: http://e360.yale.edu/features/the_myth_of_clean_coal http://www.livescience.com/56474-clean-coal-presidential-debates.html http://ngm.nationalgeographic.com/2014/04/coal/nijhuis-text http://www.popularmechanics.com/science/energy/a4947/4339171/