Which best describes the cost-benefit results of the first 20 years of the Clean Air?
A) Because many of the benefits of clean air are intangible, it is not possible to make such comparisons.
B) While costs have exceed benefits 2 to 1, benefits are expected to increase in the coming decades.
C) Costs have been far greater than the benefits.
D) In 2010, alone, estimated benefits exceeded costs by 4 to 1.
D
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Which of the following best summarizes how atmospheric concentrations of carbon dioxide change throughout the course of a year?
A. They tend to remain stable. B. They tend to go up and down. C. They tend to keep decreasing. D. They tend to keep increasing.
This map shows atmospheric moisture on Day 1 of the weather investigation, with darker areas showing the highest amount of moisture. Based on this map, which area has the driest air?
A) Southeastern United States
B) Eastern Texas
C) Southwestern United States
D) The Mississippi River valley, near Arkansas and Tennessee
In a mid-latitude cyclone, the warm sector is located?
a. ?behind the warm front. b. ?between the cold and warm fronts. c. ?below the occluded front and above the cold front. d. ?ahead of a stationary front. e. ?above the occluded front and below the cold front.
The most common oxidation effect in the lithosphere is ________
A) rusting B) exfoliation C) talus D) scree E) hydrolysis