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Author Question: The Earth has functioned as a life-supporting self-sustaining system for over 8 billion years. ... (Read 55 times)

ts19998

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on: Jul 15, 2018
The Earth has functioned as a life-supporting self-sustaining system for over 8 billion years. Indicate whether the statement is true or false.

Question 2

Students do not need to be concerned with environmental geology problems because they are all global
  in scale. Indicate whether the statement is true or false.



meow1234

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

F

Answer to Question 2

F


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