Since the 1960s, as a Result of Automobile Modifications (As

question 29

Multiple Choice

Since the 1960s, as a result of automobile modifications (as well as other factors) , carbon monoxide emissions in the U.S. have declined by more than three-fourths and ________ emissions by more than 95 percent.

• A) nitrogen oxide and hydrocarbon
• B) nitrogen hydroxide and oxygen
• C) nitrogen and oxygenated
• D) sulfur dioxide and bicarbonate
• E) hydrocarbon and sulfur dioxide

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