Question

What is the most likely effect a decrease of plant life in the biosphere would have on the atmosphere?

a.
A decrease in plant life would have no effect on the atmosphere.
b.
A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.
c.
A decrease in plant life would cause carbon dioxide levels to decrease and oxygen levels to increase.
d.
A decrease in plant life would cause an increase in all gases in the atmosphere.

Answer 1

B. A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.

Step-by-step explanation:

Answer 2

The biggest effect of the plant life on the atmosphere is that plants need carbon dioxide for the process of photosynthesis, and they produce oxygen during this process -quite the opposite of the effect that the humans have!

so the correct answer is:
b. A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.