If CFC's were banned by all countries?

Question

A.) acid rain would be eliminated
B.) destruction of the ozone layer would stop quickly
C.) photochemical smog would be reduced in large cities
D.) chlorofluorocarbons already in the atomosphere would continue to destroy ozone for another century

Answer 1

A) not eliminated entirely...take note that acid rain is also formed by other air polutants such as CO, NO, SO2, etc
B.) this will not stop quickly the ozone layer destruction. Other factories are there to emit air pollutants
C.) i think phtochemical smog is not attribute to CFC (and what about small cities w/c emits larger CFCs?)
D.) THE BEST ANSWER (CFCs' lack of reactivity gives them a lifespan which can exceed 100 years in some cases.)

Answer 2

D is the answer for at least two reasons:

The chlorine from CFCs can act over and over and over again to break ozone molecules.

The CFCs in the air at ground level take many years to reach the upper atmosphere where they begin causing the problem with the ozone layer.