Acid rain is created when chemicals in __________ react with __________.
A.
smog . . . water vapor
B.
fertilizers . . . water
C.
fertilizers . . . sunlight
D.
smog . . . sunlight
A.
smog . . . water vapor
B.
fertilizers . . . water
C.
fertilizers . . . sunlight
D.
smog . . . sunlight