Here's why:
* Combustion: Burning fossil fuels (coal, oil, natural gas) is a major source of CO2. This process combines carbon with oxygen, releasing CO2 as a byproduct.
* Respiration: Living organisms, including humans, breathe in oxygen and release CO2 as a waste product.
* Decomposition: When organic matter (plants, animals) decomposes, it releases carbon into the atmosphere in the form of CO2.
While CO2 is the most common form, other carbon compounds can also be released into the air, including:
* Methane (CH4): Released from sources like livestock, natural gas leaks, and landfills.
* Carbon monoxide (CO): Produced by incomplete combustion.
It's important to note that these forms of carbon play a vital role in the carbon cycle, but their increasing levels in the atmosphere due to human activities are contributing to climate change.
