The atmosphere will likely contain more carbon dioxide and less oxygen in the future

A.

if all coal burning power plants are replaced by wind turbines.

B.

if the rate of deforestation continues to increase.

C.

if we set aside more land for forest preserves.

D.

if more people ride bicycles instead of driving gasoline powered cars.

The answer is B.

This question is fairly straightforward, the other three options involve activities that are environmentally beneficial and would result in less Carbon Dioxide being produced by humans. Option B however says "If the rate of deforestation continues to increase." If deforestation continues to increase, less plants and trees will be available to convert carbon dioxide back to atmospheric oxygen, resulting in more carbon dioxide and less oxygen in the future.