Carbon dioxide (CO2) is a gas produced as a byproduct of combustion. When fossil fuels like coal, oil, or natural gas are burned for energy, they react with oxygen, resulting in the release of energy, along with the production of carbon dioxide and other substances such as water vapor and pollutants. Carbon dioxide is a greenhouse gas, contributing to climate change when released in large quantities into the atmosphere. Understanding and managing CO2 emissions is crucial in the efforts to mitigate global warming and its potential impacts on the environment.