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atmosphere – n. the whole mass of air that surrounds the Eart
catastrophic – adj. a terrible disaster
emission – n producing or sending out something (such as energy or gas) from a source
fossil fuels – n. a fuel such as coal, oil, or natural gas that is formed in the earth from dead plants or animals
biomass – n. organic matter used as a fuel, especially in a power station for the generation of electricity.
gigaton – n. a unit of explosive force equal to one billion tons of TNT
