1. The optimal level of pollution abatement is the level at which the                      of abatement equals the                             of abatement. 2. The marginal cost of abatement...

1. The optimal level of pollution abatement is the level at which the
   of abatement equals the

of abatement.

2. The marginal cost of abatement typically
 (increases/decreases) with the level of abatement.

3. The marginal cost of abating methane at a(n)
 rate. If the marginal benefit of methane abatement is $150 per metric ton, the optimal level of abatement is about
 million metric tons. (Related to Application 1 on page 684.)