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Author Question: The most abundant greenhouse gas in the earth's atmosphere is: a. carbon dioxide (CO2). b. nitrous ... (Read 128 times)

tsand2

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on: Jul 13, 2018

The most abundant greenhouse gas in the earth's atmosphere is:
  a. carbon dioxide (CO2).
  b. nitrous oxide (N2O).
  c. water vapor (H2O).
  d. methane (CH4).
  e. chlorofluorocarbons (CFCs).



Question 2

The only substance near the earth's surface that is found naturally in the atmosphere as a solid,
  liquid, and a gas is:
  a. carbon dioxide.
  b. water.
  c. molecular oxygen.
  d. ozone.
  e. carbon.



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okolip

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

c

Answer to Question 2

b


tsand2

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Reply 2 on: Jul 13, 2018
Excellent

marict

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

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