Question

What is a process by which long-term carbon is released into the atmosphere

Answer 1

I believe the correct answer is The carbon cycle

Answer 2

The carbon cycle

Or

Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.