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Author Question: Pollutants that enter the atmosphere directly, for example from smokestacks and tail pipes, are ... (Read 94 times)

123654777

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on: Jul 13, 2018
Pollutants that enter the atmosphere directly, for example from smokestacks and tail pipes, are called secondary air pollutants.
   a. True
   b. False

Question 2

Air pollutants can come from both natural sources and human activities.
   a. True
   b. False


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frankwu0507

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

ANSWER: False

Answer to Question 2

ANSWER: True


123654777

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Reply 2 on: Jul 13, 2018
Gracias!

nothere

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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