Air Pollution Consists of

Air pollution consists of

A) solely anthropogenic gases,particles,and other substances in amounts that cause damage to the environment or are harmful to humans.
B) a distinct class of gases,particles,and other substances that the EPA has deemed worthy of regulating.
C) solely natural gases,particles,and other substances in amounts that cause damage to the environment or are harmful to humans.
D) both natural and anthropogenic gases,particles,and other substances in amounts that cause damage to the environment or are harmful to humans.