Greenbean1308 Greenbean1308

21-02-2017
Geography

contestada

Many scientists believe that the current period of global warming is related to increased levels of ___ .
A. nitrogen in the Earth's atmosphere.
B. radon being released from the Earth's soil.
C. carbon dioxide in the Earth's atmosphere.
D. hydrogen in the outermost layer of the Earth's atmosphere.

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LinishaHunter LinishaHunter

25-02-2017

C. carbon dioxide in the Earth's atmosphere

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