According to Scientists, How Do the Levels of Carbon Dioxide

question 41

Multiple Choice

According to scientists, how do the levels of carbon dioxide in the atmosphere today compare to the past 400,000 years?

• A) There's more atmospheric carbon dioxide today.
• B) There's less atmospheric carbon dioxide today.
• C) There have been no changes in atmospheric carbon dioxide levels.
• D) Atmospheric carbon dioxide levels have fluctuated randomly.

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