(verb) to make a place clean and without litter and pollution, (verb) to hurt something or do something bad to it, (noun) the world around us, (noun) paper and other rubbish on the ground, (noun) a very large, round rock in space that goes around the sun, for example Earth or Mars, (noun) something that makes water, air or land dirty, (noun) a place for people to leave rubbish, (noun) the animals and birds living in a place.

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