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Author Question: Natural sources produce greater quantities of air pollutants than do sources attributable to humans. ... (Read 136 times)

storky111

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on: Jul 14, 2018
Natural sources produce greater quantities of air pollutants than do sources attributable to humans.
 
  Indicate whether the statement is true or false

Question 2

Problems with air pollution occurred as far back in time as the Roman period (2000 years ago).
 
  Indicate whether the statement is true or false


johnpizzaz

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Reply #1 on: Jul 14, 2018
Answer to Question 1

TRUE

Answer to Question 2

TRUE


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