Grease cars, which run mostly on used cooking oil from restaurants, have several eco-advantages:
- Vegetable oil doesn't contain sulfur, so grease cars don't release sulfur emissions that cause acid rain and increase the risk of cancer.
- Grease cars release about a third less of the level of particulates that damage the heart and lungs than gasoline-powered cars do.
- A grease car's greenhouse gas emissions -- the type that add to global warming -- are anywhere from 78 percent to 87 percent less than that of a diesel car, and the vegetables that produced the vegetable oil take in more carbon dioxide than is given off when that vegetable oil is burned in a grease car.
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