If all of the ozone-depleting substances were banned tomorrow, it would take about ___ years for earth to recover to pre-1950 levels.
a. 25
b. 50
c. 75
d. 100
e. 125
Answer: D
If all of the ozone-depleting substances were banned tomorrow, it would take about ___ years for earth to recover to pre-1950 levels.
a. 25
b. 50
c. 75
d. 100
e. 125
Answer: D
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.