AP BIOLOGY

Detailed explanation-1: -Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere.

Detailed explanation-2: -When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming.

Detailed explanation-3: -Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.

Detailed explanation-4: -Combustion of fossil fuels. We extract fossils fuels (coal, oil, and natural gas) from the ground and burn them for energy at power plants. The burning of fossil fuels is called combustion. Fossil fuel combustion releases carbon dioxide into the atmosphere.

Detailed explanation-5: -Burning of Fossil Fuels and Forests Carbon dioxide is added to the atmosphere by human activities. When hydrocarbon fuels (i.e. wood, coal, natural gas, gasoline, and oil) are burned, carbon dioxide is released.