What are 3 ways that carbon eners the atmosphere?

Carbon enters the atmosphere primarily through the combustion of fossil fuels, such as coal, oil, and natural gas, which releases carbon dioxide (CO2) as a byproduct. Additionally, deforestation contributes to carbon emissions, as trees that absorb CO2 are removed, leading to increased atmospheric carbon levels. Lastly, natural processes like volcanic eruptions and respiration from living organisms also release carbon into the atmosphere.