How is carbon dioxide released into the atmosphere?

Answer 1

There is the natural carbon cycle, in which animals exhale carbon dioxide, but plants absorb the gas and use it to build their cells, which are of course consumed by the animals. Death and rotting are also part of this long-term cycle. However this does not add new carbon dioxide to the atmosphere, and concentrations remained relatively constant in the range 260 to 280 parts per million (ppm) prior to the start of the Industrial Age.

Relatively small amounts of new carbon dioxide are released into the atmosphere by volcanic eruptions.

Anthropogenic additions of new carbon dioxide are released into the atmosphere by burning fossil fuels and manufacturing cement.

Deforestation releases into the atmosphere carbon dioxide that is not strictly from 'new' carbon but which was stored in the forests for many thousands of years, thereby adding to the atmospheric concentration of carbon dioxide.

A:After plants go through photosynthesis and when they die and decay, it comes back up into the atmosphere.

By animals, the carbon is released by the animal dying and decaying into the soil, and also carbon goes into the atmosphere from the body of the dead animal.

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Carbon dioxide is released into the air by doing simple every-day activities, such as using a dishwasher or a microwave, using air conditioning, or even turning on a light. The biggest producers of carbon dioxide are cars. In the US alone cars released 314 million metric tons in 2004. Carbon dioxide is also released into the air when plants or animals die. Bacteria, fungi, and other decomposers break down their parts, and release carbon dioxide into the air.

Answer 2

Carbon dioxide is released into the atmosphere through various human activities such as burning fossil fuels for energy, deforestation, and industrial processes. Additionally, natural processes like respiration by living organisms and volcanic eruptions also contribute to the release of carbon dioxide into the atmosphere.