Emissions (millions of tons) 40 35 30 Sulfur dioxide 25 20 15 10 LO 5 0 Volatile organic compounds (VOC) Nitrogen oxides 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 Year
The chart above shows changes in United States emissions of four types of pollutants from 1900 through 2012. Which of the following statements about this chart is most accurate? CHOOSE ONLY ONE ANSWER.
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Increased prices of oil starting in 1973 are responsible for the decreasing trends in emissions since that time. |
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Decreasing trends in air pollution emissions can be attributed to increasing use of solar and wind power in the United States starting in the 1970s. |
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Emissions of these pollutants started dropping in the 1970s due to the establishment of the United States Environmental Protection Agency and its pollution regulations |
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The general trends of increasing emissions of nitrogen oxides, and decreasing emissions of sulfur dioxide, during the first half of the twentieth century is related to the increased use of coal during that time period |
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