The marginal benefit of pollution emissions _____ as the quantity of pollution emissions _____.

A) decreases;increases
B) increases;increases
C) decreases;decreases
D) remains unchanged;goes up or down

This is because the more pollution emissions there are, the greater the negative impact on the environment and public health. As more and more pollution is released into the atmosphere, the cost of that pollution in terms of damage to the environment and public health increases. The marginal benefit of each additional unit of pollution emitted, therefore, decreases as the quantity of pollution emissions increases.