With Carnot Cycle efficiency of ~40% there is always waste heat. Nuclear energy is better than coal because CO@ emission brings up Global warming because of Green house effect which changes the albedo of the atmosphere. Carbon burning alters environment much before the actual waste heat potential is reached. Therefore Nuclear Energy is better. ~ 40% energy of 40% ie total 16% is lost in electric transmission. Therefore Compact advanced Technology Nuclear Reactors distributed near points of major consumption make greater sense.
