drought - Due to the lack of rain, we are experiencing a _____., global warming - Scientists think that polar ice caps are melting at an ever-increasing rate because of _____ _____., water pollution - Many fish are dying because of the _____ _____ that factories dump into rivers every day. , biodegradable - Some man-made materials are not _____. They can take years to decompose., landfill - Garbage that isn't recycled ends up in a _____.,

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