The gas produced by burning fossil fuels is carbon dioxide (CO2). Fossil fuels, such as coal, oil, and natural gas, release CO2 along with other pollutants when combusted for energy. This process occurs in power plants, vehicles, and industrial settings, contributing significantly to greenhouse gas emissions. The increase in atmospheric CO2 is a major driver of climate change, as it traps heat in the Earth’s atmosphere, leading to global warming. Efforts to reduce reliance on fossil fuels, increase energy efficiency, and promote renewable energy sources are essential to mitigate the effects of climate change and reduce carbon emissions.