When Which increases the amount of carbon dioxide in the atmosphere acting as a carbon source?

When human activities such as burning fossil fuels, deforestation, and industrial processes increase the amount of carbon dioxide in the atmosphere, they act as a carbon source. This additional CO2 contributes to the greenhouse effect, leading to global warming and climate change. Natural processes, such as respiration and decomposition, also release CO2, but human activities have significantly amplified these emissions, disrupting the carbon cycle. Reducing these emissions is crucial for mitigating climate impacts.