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If organic matter is buried - such as in landfill - it will decay anaerobically, resulting in CH4 (methane) rather than CO2 (Carbon dioxide). Methane is about 30 times more harmful as a global warming gas. Hence the reason why it is important not to landfill organic matter such as paper, card or waste food. However landfill of plastics (which is generally ...


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Possibly the strongest human "fingerprint" on rising CO2 levels comes from the changing ratio of carbon isotopes. Basically, there are three isotopes of carbon -- carbon atoms with varying weights of neutrons -- carbon-12, carbon-13, and carbon-14. Carbon-12 and carbon-13 are stable and make up most of of the carbon in living things and the atmosphere. (I'm ...


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