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

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


A

Environmental & Atmospheric Sciences

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The ratio of vapor pressure to saturation vapor pressure is the ____________________ ____________________

Fill in the blank(s) with correct word

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Which word best describes volcanic rock?

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