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chew – v. to use your teeth to cut food into small pieces before you swallow it

scree – n. an area of loose stones on the side of a mountain

black market – n. an illegal market

garbage – n. things that are no longer useful or wanted and that have been thrown out

toxin – n. a poisonous substance and especially one that is produced by a living thing

glacier – n. a very large area of ice that moves slowly down a slope

dump – v.