Which of the Following Is True of Carbon Dioxide

question 82

Multiple Choice

Which of the following is true of carbon dioxide?

• A)It is unimportant in regulating the temperature of the planet.
• B)Today,it far exceeds its natural range of 180 to 300 pp.
• C)It occurs in large amounts in the atmosphere relative to other gases,such as nitrogen and oxygen.
• D)Overall,atmospheric CO2 has decreased by 16% from 1992 to 2012.

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