Question

if all the trees in a forested area are cut down, in what two ways will the air composition in that area change?
a. carbon dioxide levels will increase.
b. oxygen levels will decrease.
c. oxygen levels will increase.
d. carbon dioxide levels will decrease.

Explanation:

Trees perform photosynthesis, taking in carbon - dioxide and releasing oxygen. Without trees, less carbon - dioxide is absorbed and less oxygen is produced.

Answer:

A. Carbon dioxide levels will increase.
B. Oxygen levels will decrease.