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Author Question: The concentration of atmospheric lead increased substantially during the 1990s. Indicate whether ... (Read 69 times)

renzo156

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The concentration of atmospheric lead increased substantially during the 1990s.
  Indicate whether the statement is true or false

Question 2

Carbon monoxide forms in forest fires.
  Indicate whether the statement is true or false



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rachel

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Answer to Question 1

False

Answer to Question 2

True




renzo156

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Reply 2 on: Jul 13, 2018
Gracias!


epscape

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Reply 3 on: Yesterday
Wow, this really help

 

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