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Which of the Following Have Contributed Most to the Increase

Question 16

Multiple Choice

Which of the following have contributed most to the increase in atmospheric carbon dioxide levels over the past 250 years?


A) The thawing of permafrost and habitat alteration for agriculture
B) Deforestation and ocean acidification
C) Deforestation and combustion of fossil fuels
D) Volcanic eruptions and widespread forest fires

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