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© American Chemical Society (A Britannica Publishing Partner)How much does a cloud weigh?
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Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Evgeniy Parilov/Dreamstime.comLearn how plastic debris affects the Pacific Ocean.
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Encyclopædia Britannica, Inc.Smog formation and entrapment over Los Angeles.
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Encyclopædia Britannica, Inc.Learn more about the major kinds of pollution in this infographic explainer.