Which of these processes removes carbon dioxide from the atmosphere?

Examine the chemical equation for photosynthesis: The general equation for photosynthesis can be represented as: $6_{\mathrm{CO}2}+6_{H2O}\to C_{6H\mathrm{12}O6}+6_{O2}$. This equation shows that carbon dioxide is consumed during photosynthesis.

Contrast photosynthesis with other processes: Combustion, respiration, and decomposition are processes that release carbon dioxide into the atmosphere rather than removing it. Combustion involves burning fuels, respiration is the process by which organisms convert glucose and oxygen into energy, and decomposition is the breakdown of organic matter.