Which of the following is the most likely cause for the sudden sharp increase in atmospheric carbon dioxide levels?
A) Human activities, including the use of fossil fuels, changes in agricultural practices, and deforestation
B) Natural events, including fires and volcanic activity
C) Respiration from the earth's many living organisms
D) Normal fluctuations in the natural levels of carbon dioxide in the atmosphere
Correct Answer:
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A) the
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A) decreases the amount of
Q30: How do greenhouse gases cause climate warming?
A)
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