AP Environmental Sciencemediummcq1 pt
Which factor makes coal the most polluting common fuel?
A.Its combustion releases SO₂, mercury, particulates, and the most CO₂
B.It is radioactive
C.It cannot be mined safely
D.It emits no pollutants
Explanation
Core Concept
Coal's impurities and carbon density make it the dirtiest fossil fuel per joule — the driver of historic smog and acid rain.
Correct Answer
AIts combustion releases SO₂, mercury, particulates, and the most CO₂
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