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Author Question: Global warming is caused by increased concentrations of ____________________ in the atmosphere Fill ... (Read 44 times)

nmorano1

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on: Jul 15, 2018
Global warming is caused by increased concentrations of ___________________ _ in the atmosphere Fill in the blank(s) with the appropriate word(s).

Question 2

Earths human population reached ___________________ _ in 2011 and is prjected to be
  ___________________ _ in 2045. Fill in the blank(s) with the appropriate word(s).



TheDev123

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Reply #1 on: Jul 15, 2018
Answer to Question 1

greenhouse gases

Answer to Question 2

7 billion, 9 billion


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