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Author Question: Since the Clean Air Act of 1970, emissions of most pollutants have fallen off substantially, with ... (Read 197 times)

serike

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on: Jul 13, 2018
Since the Clean Air Act of 1970, emissions of most pollutants have fallen off substantially, with _____ showing the greatest reduction.
   a. sulfur dioxide
   b. methane
   c. lead
   d. carbon dioxide
   e. carbon monoxide

Question 2

Volcanic eruptions are an important natural source of ____.
   a. benzene
   b. ozone
   c. sulfur dioxide
   d. carbon monoxide
   e. chlorofluorocarbons


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nmyers

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Reply #1 on: Jul 13, 2018
Answer to Question 1

ANSWER: c

Answer to Question 2

ANSWER: c


serike

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Reply 2 on: Jul 13, 2018
Thanks for the timely response, appreciate it

nguyenhoanhat

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Reply 3 on: Yesterday
Gracias!

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