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QiTian QiTian
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6 years ago
Which of the following air pollutants is emitted in about equal amounts by stationary and mobile sources?
 a. particulates
  b. carbon monoxide
  c. sulfur dioxides
  d. hydrocarbons
  e. nitrogen oxides
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juliaguayjuliaguay
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6 years ago
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QiTian Author
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6 years ago
Thanks for your help!!
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Just got PERFECT on my quiz
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2 hours ago
Thanks
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