Human Activities Have Disrupted the Carbon Cycle by

Multiple Choice

Human activities have disrupted the carbon cycle by

A) burning carbon stored as fossil fuels or biomass, thus increasing the amount of carbon dioxide in the atmosphere.
B) decreasing the primary productivity of the oceans, resulting in increased atmospheric carbon dioxide.
C) burning methane hydrates to produce electricity.
D) acidifying the ocean, resulting in the release of large amounts of dissolved carbon dioxide into the atmosphere.