Desalination plants, such as the one just completed in Tampa Bay,
A) are less expensive than groundwater supplies.
B) are a sustainable virtually unlimited source of water.
C) produce enough water for local agricultural crops such as corn.
D) cause groundwater levels to drop.
B
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The temperature at which specific humidity equals saturation specific humidity is known as the ________
Fill in the blank(s) with the appropriate word(s).
The Permian mass extinction event was most likely caused by enormous volcanic (trap) eruptions.
A. True B. False
La Niña
A) always occurs simultaneously with El Niño. B) always occurs in the year after El Niño. C) lasts between 3 and 6 months. D) is caused by intensified trade winds. E) leads to warmer than normal waters in the eastern Pacific.
How do treadmills of production tend to make the economy act like it has “invisible elbows”?
a) By deliberately and inadvertently causing environmental degradation b) By battling for economic survival of the fittest c) By guiding all towards prosperity due to competition d) All of the above