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2. Some areas of the south have not had any rain for several months. The __________ of water has already killed crops, trees, and other plants.

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3. Many people have been told that they should drink eight glasses of water each day on . However, plain water isn't the only you can drink; tea, coffee, and other non-sugary drinks are also OK.

4. People who work for oil companies are searching for new sources of oil. Oil is usually ___________ deep under layers of rock.

5. The politician lost his position in the government because of his lack of concern for the ___________. Many people disagreed with his views about developing the country's natural areas.

6. The charity CleanAir called for the government to _ information about pollution in cities. A spokesperson said, "Citizens have a right to know if the __ of pollution is dangerous."