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an inorganic compound with the formula KOH, commonly called caustic potash. It can be used to absorb carbon dioxide from air.
a tube that carries air into the lungs.
the deposition or build-up of silt and organic matter on the beds of rivers, dams etc.
(also called homeostatic control) the self-regulation and maintenance of a constant stable...
chlorofluorocarbons (CFCs) are organic compounds that contain carbon, chlorine and fluorine.
external opening of the rectum (part of the mammalian digestive tract) through which faeces are...