Analyze Data Using natural fluxes, is the air-sea gas exchange balanced? Is the carbon used in photosynthesis balanced by carbon given off by cellular respiration? Use data from the diagram to
support your answers.

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis