Answer:
Step-by-step explanation:
Several processes in the carbon cycle release CO2, including:
Respiration: Both plants and animals release CO2 during the process of respiration when they break down organic compounds to obtain energy.
Combustion: The burning of fossil fuels, such as coal, oil, and natural gas, releases CO2 into the atmosphere. This includes activities like burning gasoline in vehicles, using coal or gas for electricity generation, and industrial processes.
Decay and Decomposition: When organic matter, such as dead plants or animals, decays or decomposes, it releases CO2 as a byproduct.
Volcanic Activity: Volcanic eruptions release CO2 along with other gases, contributing to the release of carbon dioxide into the atmosphere.
These processes contribute to the natural carbon cycle, but human activities, particularly the burning of fossil fuels, have significantly increased the amount of CO2 being released into the atmosphere, leading to enhanced greenhouse effect and climate change.