[dubcomesaveme]

incomplete combustion\plenty of other stuff in the ground in it(heavy metals etc.). The smoke is not just CO2.

Plus " sulfur dioxide (SO2) and nitrogen oxides (NOx) are the primary causes of acid rain. In the US, About 2/3 of all SO2 and 1/4 of all NOx comes from electric power generation that relies on burning fossil fuels like coal." http://www.policyalmanac.org/environment/archive/acid_rain.s...

and acid rain causes a number of environmental problems.

[bjelkeman-again]

NOx also creates low level ozon when it breaks down, which has a number of nasty environmental and health side effects as well.