Fossil fuel combustion is the process of burning fossil fuels, such as coal, oil, and natural gas, to produce energy. This process releases energy stored in these fuels, which is then used to generate electricity, power vehicles, and heat buildings. When fossil fuels are burned, they release carbon dioxide and other greenhouse gases into the atmosphere. This contributes to climate change and air pollution, which can have harmful effects on both the environment and human health. Efforts are being made to reduce reliance on fossil fuels and transition to cleaner energy sources.