Water Resources
Even though water covers most of Earth's surface, only about 2.5 to 3 percent of it is fresh water, and most of that is either frozen in glaciers and ice caps or stored underground, leaving just a small share available in rivers and lakes that people can easily use. Because usable fresh water is limited and unevenly distributed, many regions face water scarcity even though the planet as a whole has plenty of water overall.
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Midterm
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This final covers a lot of topics, so it's split into 2 parts. Each part includes a question from every one of its topics.
Final, Part 1 of 2
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Final, Part 2 of 2
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