Question

Humans have greatly increased the level of in the atmosphere. O A. argon B. oxygen O . C. carbon dioxide O D. nitrogen

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Answer 1

C

Step-by-step explanation:

Think of the greenhouse effect. The burning of fossil fuels causes carbon dioxide emissions.

Answer 2

Humans have greatly increased the level of in the atmosphere. O A. argon B. oxygen O . C. carbon dioxide O D. nitrogen

=carbon dioxides