Which of the following currently is the most sustainable and affordable long-term source of water in the face of global warming?
A) Desalination of seawater
B) Using hydroelectric dams to generate electricity to pump aquifers for irrigation
C) Using coal generated electricity to desalinate seawater
D) Using natural gas to generate electricity to melt glaciers
A
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A. blurry. B. sharp. C. gradational.
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A basic assumption of central place theory is that people are spread evenly over space
Indicate whether this statement is true or false.