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organisms, such as plants, which are able to produce their own organic foodstuffs from inorganic nutrients.
pollutant gases such as nitrogen monoxide and nitrogen dioxide. They are produced during ...
the trapping of the sun's heat energy by certain gases in the atmosphere, e.g. carbon dioxide...
a layer of ozone gas which occurs naturally in the upper atmosphere, and protects life by...
(also called vascular tissue) the tissues that transport water and dissolved food in a...