Short Answer

Efficiency of Tradable Pollution Permits

Imagine a scenario with two polluting firms. Firm X can reduce its emissions at a cost of $10 per ton, while Firm Y can reduce its emissions at a cost of $30 per ton. The government wants to reduce total pollution by 20 tons and initially requires each firm to reduce its emissions by 10 tons. Explain why allowing these two firms to trade pollution permits could achieve the same total 20-ton reduction at a lower overall cost to society.

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Updated 2025-09-18

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