* Photosynthesis: Plants use CO2 during photosynthesis, the process where they convert sunlight, water, and CO2 into sugars (their food) and oxygen.
Let's break it down:
1. Sunlight: Provides the energy for the process.
2. Water: Taken up by the roots.
3. CO2: Absorbed through tiny pores called stomata on their leaves.
In this process, plants release oxygen (O2) back into the atmosphere, which is essential for animal life. So, the exchange of CO2 and O2 between plants and the atmosphere is a crucial part of the Earth's ecosystem.
