17) Air pollution is accurately described by which of the following?
A) Air pollution occurs when more pollutants are emitted into the atmosphere than can be safely
absorbed and diluted by natural processes.
B) A majority of the people in the United States breathe unsafe air for at least part of the year.
C) Air pollution caused by particulate matter is responsible for fewer than 600 premature or
unnecessary deaths annually.
D) The EPA has identified hundreds of “criteria” pollutants, relatively common harmful
substances that serve as indicators of overall levels of air pollution.
18) Which of the following statements is not true with respect to acid rain?
A) A primary source of acid rain is coal-fired utilities.
B) Acid rain occurs when carbon dioxide combines with water vapor in the atmosphere.
C) Acid rain is worse in some regions of the United States than others.
D) Acid rain degrades buildings.
19) Which of the following is not true about water pollution?
A) It affects crop yields.
B) It can be caused by pesticides and herbicides.
C) It can be caused by biodegradable products.
D) The Water Pollution Control Act maintains the integrity of all surface water in the United
States.