AP BIOLOGY

Detailed explanation-1: -During combustion or burning, carbon from fossil fuels combine with oxygen in the air to form carbon dioxide and water vapor. These natural hydrocarbon fuels come from once-living organisms and are made from carbon and hydrogen, which release carbon dioxide and water when they burn.

Detailed explanation-2: -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-3: -In terms of chemistry, combustion is a chemical reaction in which an oxidant reacts rapidly with a fuel to liberate stored energy as thermal energy, most often in the form of high-temperature gases.

Detailed explanation-4: -The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

Detailed explanation-5: -Human activities that lead to carbon dioxide emissions come primarily from energy production, including burning coal, oil, or natural gas.