Which of the following most significantly determines a community's access to potable water?
The defining characteristic of potable water is that it _______.
Lakes and rivers constitute _______.
Which of the following is not an option for solving the world water crisis?
Which of the following best explains why humans need constant supplies of fresh water?
Which of the following best explains the importance of water to humans?
Which of the following is least likely to have difficulties with economic access to potable water?
Drinking non-potable water does not carry significant health risks.
In developed nations, the water delivered to homes by pipe is generally potable.
Which of the following best describes the availability of freshwater on Earth?
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