The two key concepts discussed under Section 13.1. The definition of freshwater. The reason why access to water is a health issue, an economic issue, a national and global security issue, and an environmental issue. The percentage of the Earth’s freshwater that is available to humans. The way in which water is recycled by the hydrologic cycle and the way in which human activities can interfere with this cycle. The definitions of groundwater, zone of saturation, water table, and aquifer, and the way in which aquifers get recharged. The definition of deep aquifers and the reason why they are considered as non-renewable. The definition and difference between surface water and surface runoff. The definition of a watershed.

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Chapter 13, Problem 2CR

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The two key concepts discussed under Section 13.1. The definition of freshwater. The reason why access to water is a health issue, an economic issue, a national and global security issue, and an environmental issue. The percentage of the Earth’s freshwater that is available to humans. The way in which water is recycled by the hydrologic cycle and the way in which human activities can interfere with this cycle. The definitions of groundwater, zone of saturation, water table, and aquifer, and the way in which aquifers get recharged. The definition of deep aquifers and the reason why they are considered as non-renewable. The definition and difference between surface water and surface runoff. The definition of a watershed.

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