With Immediate and Sustained Action to Stop Production of All

Multiple Choice

With immediate and sustained action to stop production of all ozone-depleting chemicals:

A) The ozone-hole problem will be solved immediately.
B) It will take about 5 years for the earth's ozone layer to recover to 1980 levels.
C) It will take about 30 years for the earth's ozone layer to recover to pre-1950 levels.
D) It will take about 60 years for the earth's ozone layer to recover to pre-1950 levels.
E) It will take about 60 years for the earth's ozone layer to recover to 1980 levels.