As a Result of Measures to Control Acid-Deposition in North

question 32

Multiple Choice

As a result of measures to control acid-deposition in North America,over the last 20 years emissions of sulfur dioxide have been

• A)steady,with little decrease in acid-deposition due to rising levels of nitrogen oxides.
• B)reduced by about 10%,at great cost to the power producing industry.
• C)reduced to target levels at about the projected cost of compliance.
• D)reduced beyond target levels and at 10% of the projected compliance costs.