Exam 11: Water Resources and Water Pollution

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Most freshwater in the eastern U.S.is used for manufacturing and cooling power plants.​

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The process called ____________________ involves removing dissolved salts from ocean water to increase supplies of freshwater.​

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What causes cultural eutrophication?​

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What is the most efficient form of irrigation?​

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____________________ is the process where bodies of water are enriched with natural nutrients.

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​When South Africa raised water prices,low-income consumers were helped be establishing ____________________,which give each household a set amount of free or low-priced water to meet basic needs.

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When chemical pollutants reach a(n)____________________,successful cleanup is often not possible or is too expensive.​

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Damaging algal blooms occur annually in several hundred ____________________ zones around the globe within temperate coastal waters and in large bodies of water with restricted outflows.​

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Explain what causes an oxygen sag curve and how this can impact natural populations in that ecosystem.​

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Freshwater that is used indirectly is called ____,which is the freshwater that is not directly consumed but is used to produce food and other products.​

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What phenomenon can alter the hydrologic cycle on a global scale?​

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What aquatic ecosystem is most capable of diluting,dispersing,and degrading large amounts of sewage,sludge,and oil?​

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____________________ are deep underground sources of freshwater found between the porous geological layers of sand,gravel,or bedrock.​

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Salt from the region of the Aral Sea is being blown onto the alpine glaciers of the Himalayas,and is causing them to melt at faster than normal rates.​

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Drinking is the biggest use of water worldwide.​

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Approximately 70% of the water withdrawn worldwide each year is used for ____.​

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Explain how soil erosion,associated with poor agricultural practices,can lead to a decrease in dissolved oxygen in bodies of water.​

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According to water resource experts,what are the two main causes of water waste?​

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Why might the location of the city of Las Vegas in the southwest desert be considered unsustainable? Consider using information about water scarcity and stress found in Chapter 11 Water Resources and Water Pollution.​

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What decreases photosynthesis in bodies of water?​

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