A lot of factories ..... the earth every day. This means that they put harmful chemicals and other dirty, unnatural substances into the atmosphere, land, fresh water supply and oceans.

English as a Second Language Single question discussions
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A lot of factories ..... the earth every day. This means that they put harmful chemicals and other dirty, unnatural substances into the atmosphere, land, fresh water supply and oceans. (*) pollute (*) preserve (*) recycle

This is a companion discussion topic for the original entry at https://english.best/questions/17547,a-lot-of-factories-___-the-earth-every-day-this-means-that-they-put-harmful-chemicals-and-other-dirty-unnatural-substances-into-the-atmosphere-land-fresh-water-supply-and-oceans/