AP Environmental Sciencemediummcq1 pt
Cap-and-trade programs reduce SO₂ by
A.letting firms buy and sell emission allowances
B.banning all power plants
C.subsidizing high-sulfur coal
D.building taller smokestacks
Explanation
Core Concept
A shrinking cap plus tradable permits cuts sulfur emissions at the lowest cost — the successful acid-rain program of the 1990s.
Correct Answer
Aletting firms buy and sell emission allowances
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