1.

name one natural and one man made process by which CO2 returns in the atmosphere

Answer»

Respiration is the natural and combustion man made process

Atmospheric carbon dioxidederives from multiplenaturalsources including volcanic outgassing, the combustion of organic matter, and the respiration processes of living aerobic organisms;man-madesources ofcarbon dioxidecome mainly from the burning of various fossil fuels for power generation and transport use.



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