Sunlight is the only resource which is not obtained from Earth. Sun energy is found in all things, including fossil fuels. Plants depend on the sun to make food, animals eat the plants, and both ended up becoming the key ingredients for fossil fuels. Without the sun, nothing on this planet would exist. Ethanol, unlike petroleum, produces no net carbon dioxide emissions. That's because ethanol is made from plants that remove carbon dioxide from the air while growing.
