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pollutant gases such as nitrogen monoxide and nitrogen dioxide. They are produced during combustion, especially at high temperatures. They are harmful to human health. They can react with water to make nitric acid, which may end up in the soil, where it makes nitrates, which is of use to growing plants.
the effect of the relative lengths of daylight and darkness on the physiology and behaviour of...
region of the kidney into which urine is discharged from the collecting ducts of the nephrons,...
organisms, such as plants, which are able to produce their own organic foodstuffs from inorganic...
the formation of layers of water of different temperatures in large bodies of water - dams,...