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Author Question: The most important source of the free oxygen in our atmosphere is: A) green plants that carry on ... (Read 89 times)

amal

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on: Jul 14, 2018
The most important source of the free oxygen in our atmosphere is:
 
  A) green plants that carry on photosynthesis.
  B) the dissociation of water vapor in the upper atmosphere.
  C) deforestation.
  D) volcanic degassing.

Question 2

Students at MIT developed a method to produce ________ from agricultural wastes, resulting in a safer indoor fuel for use in developing countries.
 
  A) ethanol B) biodiesel C) fuel cells D) wood E) charcoal
The Environment and You ¦ Christensen, Leege ¦ 2nd Edition
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ong527

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

A

Answer to Question 2

E


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amal

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Reply #2 on: Jul 14, 2018
Thank you :)


ong527

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Reply #3 on: Jul 14, 2018
Happy to help you


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