题目内容

Why is exact amount of damage caused by different levels of pollution difficult to measure with certainty?

A. Uncertainty in nature.
B. Uncertainty in human reactions.
C. The instruments used are primitive and unreliable.
Damage can occur in the distant future, difficult to predict with accuracy.

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A marginal damage function shows the change in damages as a result of a unit change in emissions (排放 ) or ambient concentration.

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B. 错

A marginal abatement function shows the change in damages as a result of a unit change in emissions (排放 ) or ambient concentration

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Thresholds (阈值) are levels of emissions or ambient concentration below which marginal damages are zero.

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Abatements (阈值) are levels of emissions or ambient concentration below which marginal damages are zero.

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