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Fuels such as oil, natural gas, and mineral coal – fossilized plant residues – that are buried in the Earth's crust and reached their present state through chemical reactions over long periods of time. They are produced by the continuous decomposition of organic...
Emissions produced as a result of human action. For example, large amounts of carbon dioxide are being released into the atmosphere by activities such as the burning of fossil fuels, agriculture, cement making, and so on.
Any processes, activities or mechanisms, including biomass, and especially forests and oceans, which have the property of removing a greenhouse gas, aerosols or precursors of greenhouse gases from the...