According to economists, why is coal used so widely?
A. The harmful environmental effects are not included in the price.
B. It can be mined without any harmful environmental effects.
C. It can produce electricity without any harmful environmental effects.
D. The costs of mining and transportation are not included in the price.
Answer: A
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Which of the following is most closely associated with a mantle plume?
A) The lower Mississippi River Valley B) The Hawaiian Islands C) The Florida peninsula D) Southern California E) Western Europe
The complete combustion of fossil fuels and refuse produces
A) radon and carbon monoxide. B) volatile organic compounds. C) sulfuric acid and nitric acid. D) carbon dioxide and water vapor.
Tsunami effects are increased by ____
a. ?increasing water depth b. ?the funneling effect of bays c. ?changes in water temperature and density d. ?sandbars near shore e. ?hot weather
Radon-222 gas is commonly used to make furniture, drapes, carpeting, foam insulation, and other products.
Answer the following statement true (T) or false (F)