Biology, 30.04.2021 17:50, goblebrandon

LScientists are investigating the cause of the large increase in atmospheric carbon dioxide concentration since about 1800. Which of the following provides the best explanation for the increase? (SC.912.L.17.18)
A eruptions of large volcanoes
B. use of fossil fuels by humans
C. natural fluctuations of climate
D. photosynthesis by phytoplankton

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