The Carbon Cycle

1) Carbon dioxide is removed from the atmosphere by green plants and algae through photosynthesis, and the carbon is used to make carbohydrates, fats and proteins in the plants and algae.

2) Some of the carbon is returned to the atmosphere as carbon dioxide when plants and algae respire. Some of the carbon becomes part of the fats and proteins in animals when the plants and algae are eaten. The carbon then moves through the …