Acid deposition is properly defined as the ____ deposition of ____ pollutants onto earth's surface.

Acid deposition is properly defined as the ____ deposition of ____ pollutants onto earth's surface.

Acid deposition is properly defined as the ____ deposition of ____ pollutants onto earth's surface.




a. wet; secondary

b. dry; secondary

c. wet and dry; primary

d. wet and dry; secondary

e. dry; primary









Answer: D