Where does CO2 comes from?
Cell respiration
CO2 (carbon dioxide) comes from multiple sources, both natural and human-made. Here are some examples:
1. Respiration: When humans and animals breathe, they exhale CO2.
2. Combustion: CO2 is emitted when fuels such as coal, oil, and gas are burned for energy production.
3. Transportation: Cars, trucks, trains, planes, and ships produce CO2 emissions from their internal combustion engines.
4. Industry: The manufacturing of products such as cement, steel, and chemicals also produces significant amounts of CO2.
5. Deforestation: Trees absorb CO2 through photosynthesis, and when they are cut down or burned, the CO2 is released into the atmosphere.
6. Natural processes: CO2 is also naturally released through volcanic eruptions and the decay of organic matter.
Overall, human activities have significantly increased the level of CO2 in the atmosphere, leading to climate change and other negative impacts on the environment.
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