Which of the following decreases carbon dioxide levels in the atmosphere?

A. Cellular respiration

B. Decomposition by bacteria

C. Burning Fossil Fuels

D. Photosynthesis

Hello!

D. Photosynthesis decreases carbon dioxide levels in the atmosphere.

You see, plants use more of carbon dioxide in photosynthesis than they use in respiration.

They produce more oxygen by photosynthesis than they use in respiration.

In the end, plants put more oxygen in the air than carbon dioxide.