practice for what you should do in an emergency a drill a fuel such as coal, oil or natural gas (formed from the remains of dead plants and animals) a fossil fuel a chemical element found in coal, oil and living things carbon money paid by a government to keep the price of certain products low a subsidy a type of animal or plant not existing any more extinct to return something or someone to its original state to restore to pay for to fund the plants, animals, climate, etc. in an area and how they are linked an ecosystem