What percentage of the increase in global average temperature since 1980 are orbital changes likely responsible for?

A. 0%
B. 10%
C. 50%
D. 100%


Answer: A. 0%

Environmental & Atmospheric Sciences

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Indicate whether the statement is true or false.

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Why has the Sahel been a focus of attention in recent times? What will be an ideal response?

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Basque is spoken primarily in

A) Brittany. B) the Swiss Alps. C) the Pyrenees Mountains. D) Barcelona, Spain. E) Liechtenstein.

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The Berlin Wall and the Mexican border are good examples of ________ boundaries

A) exclusionary B) inclusionary C) unitary D) monetary E) illusionary

Environmental & Atmospheric Sciences