AP Environmental Sciencehardmcq1 pt
Cap-and-trade for CO₂ works by
A.capping total emissions and letting firms trade allowances
B.banning all industry
C.subsidizing coal
D.planting trees for every ton
Explanation
Core Concept
A declining cap plus a market for permits cuts emissions at the lowest cost — the same mechanism that tamed acid rain.
Correct Answer
Acapping total emissions and letting firms trade allowances
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