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Fossil fuels: Fossil fuels, such as coal, oil, and natural gas, are the most common source of non-renewable electricity. They are formed from the remains of plants and animals that lived millions of years ago. When these fuels are burned, they release carbon dioxide and other greenhouse gases into the atmosphere, which contribute to climate change.
* Nuclear power: Nuclear power is another major source of non-renewable electricity. It uses uranium, a radioactive element, to produce heat that is used to generate steam and turn a turbine. Nuclear power does not produce greenhouse gases, but it does produce radioactive waste, which must be managed carefully.
