Final answer:
Cellular respiration is the primary biological process that releases carbon dioxide into the atmosphere. Other natural sources include the decomposition of organic materials and human activities like burning fossil fuels. Carbon dioxide is a greenhouse gas that contributes to global warming.
Step-by-step explanation:
Biological Processes Releasing Carbon Dioxide
The biological process that releases carbon dioxide (CO2) back into the atmosphere is known as cellular respiration. This is a fundamental process in which living organisms, including plants and animals, convert organic compounds into energy, producing CO2 as a byproduct. Not only through respiration, but CO2 is also released during the decomposition of dead organisms and organic materials.
In addition to these biological methods, human activities such as the burning of fossil fuels and the production of cement are major contributors to the increased levels of CO2 in our atmosphere. Carbon dioxide is considered a greenhouse gas because it traps heat in the atmosphere, leading to global warming and climate change. The increase of greenhouse gases results in temperature rises, which can lead to severe environmental and climatic disturbances.