 Energy and the future. Renewable. When something is renewable, it means that it can be used again and again. Wind and solar power are examples of renewable energy sources. Non-renewable. If something is non-renewable, it means that it cannot be used again. Fuel, oil, and gasoline are examples of non-renewable resources. Energy. Energy is a source of power from natural or chemical resources. Conserving energy and fuel are ways that we can save the Earth's natural resources. Efficient. When something is efficient, it does not waste energy or resources. Energy-efficient appliances and electronic devices help save electricity. Appliance. Appliances are machines used in the home. Examples of appliances are refrigerators, ovens, washing machines, and coffee pots. Thermostat. A thermostat is the device that controls the temperature in your home or office. Turning your thermostat down when you leave your house can help you save energy. Window covering. Window coverings are materials that are used to cover windows. Window coverings include things like blinds, curtains, and shutters. Laundry. Clothes, sheets, or other things that you wash are called laundry. Using cold water and washing similar things together can help you save electricity. Insulation. Insulation is material that is placed between walls. Well-insulated buildings stay cooler in the summer and warmer in the winter. This helps save energy. Draft. A draft is cold air that comes through a space like a door or window. Drafts are common in older homes. Window treatments can help prevent cold drafts. The end.