Combustible fuels are materials that can burn and release energy in the form of heat. Common examples include coal, natural gas, and oil. These fuels are often used to generate electricity, heat homes, and power vehicles. When burned, they undergo a chemical reaction with oxygen, producing carbon dioxide and water as byproducts. The use of combustible fuels has significant implications for the environment. Burning these fuels contributes to air pollution and climate change due to the release of greenhouse gases. As a result, there is a growing interest in alternative energy sources, such as solar and wind power, which are more sustainable and environmentally friendly.