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an international agreement to phase out the use of CFCs, signed by 49 countries in Montreal, Canada, in 1987.
small structures found in the jaw that are used for biting and chewing food.
part of the skeleton consisting of the skull, vertebral column, sternum and ribs.
an inorganic compound with the formula KOH, commonly called caustic potash. It can be used to...
an area of land which is usually covered with shallow water, and which supports plants adapted...