one of the vital components of the carbon cycle, carbon dioxide serves as a greenhouse gas with a chemical composition of one carbon and two oxygen atoms. also referred to as dry ice and with molecular formula co 2 natural sources – process of breathing, combustion of organic matter, ...
atmospheric carbon dioxide serves as the main source of carbon for plants. q2. which of the following factor contributes to the carbon cycle? (a) fossil fuel combustion (b) photosynthesis (c ) respiration (d) all of the above answer: (d) fossil fuel combustion, photosynthesis and respiration...