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atmospheric gases, especially carbon dioxide, methane, nitrous oxide, ozone and water vapour, which trap heat energy in the atmosphere.
the site where a nerve impulse is transmitted from one neuron to the next. There is no physical...
dietary supplements of live bacteria that are good for human health.
the splitting of water molecules into oxygen atoms and energy-rich hydrogen atoms to be used in...
(SO2) a colourless gas that smells of rotten eggs or burnt matches and is produced by...