Why should many residents of Canada be concerned about the type of coal burned in Midwestern U.S. power plants?
a. Because acid rain caused by these plants affects lakes and forests in eastern Canada
b. Because the Canadian economy is heavily dependent on the sale of high-sulfur coal
c. Because the Canadian economy benefits directly from the sale of smokestack scrubbers
d. Because Canada is a major producer of sulfur dioxide and a source of acid rain
e. Because the extraction of low-sulfur coal in Canada is quite damaging to farm land
Answer: A
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