The process that subtracts CO2 from Earth's atmosphere is photosynthesis. Here's a breakdown to help you understand:
1. Photosynthesis: During photosynthesis, plants, algae, and some bacteria use sunlight, water, and CO2 to produce glucose (sugar) and oxygen. This process occurs in chloroplasts within plant cells.
2. How it works: The green pigment chlorophyll absorbs sunlight, which is used to convert carbon dioxide (CO2) and water (H2O) into glucose (C6H12O6) and oxygen (O2). The equation for photosynthesis is 6CO2 + 6H2O + light energy → C6H12O6 + 6O2.
3. Result: As a result of photosynthesis, carbon dioxide is taken from the atmosphere, which helps reduce the overall CO2 levels in the air. Oxygen is released as a byproduct, benefiting living organisms that require it for respiration.
So, in the given options, photosynthesis is the process that subtracts CO2 from Earth's atmosphere.
