Question

Unit Test

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O water vapor
O methane
O fluorinated gas
O carbon dioxide
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TIME REMAI
01:58:3
Which substance is a greenhouse gas that is emitted by human activities, is the most widespread, and remains in
the air the longest?

Answer 1

Answer: Carbon dioxide

Explanation: Carbon dioxide (CO2) is a greenhouse gas that is emitted by human activities, is widespread, and remains in the air for a long time.