| 6.1 The hydrologic cycle moves water around Earth
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| 6.2 The El Niño Southern Oscillation causes periods of dry years and wet years
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| 6.3 Access to adequate water supplies as a human right
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| 6.4 Humans already use most of the worldâs accessible freshwater supplies
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| 6.5 Groundwater is being depleted faster than it is replenished
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| 6.6 Managing water for human use threatens aquatic biodiversity
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| 6.7 Water conservation can increase water use efficiency substantially
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| 6.8 Reclamation and recycling are saving water throughout the world
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| 6.9 Desalination taps Earthâs largest reservoir of water
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| 6.10 Conservation and restoration can protect aquatic ecosystems and biodiversity
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| Central Question: How can we meet human needs for freshwater, while avoiding or reducing environmental impact?
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| Chapter 6: Review Questions
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