Vegetable chip chips may be prepared with sliced vegetables that are fried, deep-fried, baked, dehydrated, or simply dried. Vegetable chips may be produced from a variety of root vegetables and leaf vegetables, such as carrot, turnip, parsnip, beet, radish, taro root, sweet potato, garlic, zucchini, cassava, kale, spinach, fennel and jicama, among others. Some baked versions utilize vegetables that are sliced, lightly tossed in oil, and then oven-baked until crisp. Vegetable chips prepared using this method have been described as more healthful compared to deep fried chips, particularly when prepared using "heart-healthy" olive oil. Simple versions are prepared by slicing vegetables and
Vegetable oils as alternative energy that yields 20% more oil than the standard variety. There is concern that the current growing demand for vegetable oil is causing deforestation, with old forests being replaced with oil palms. When land is cleared it is often burned, which releases large amounts of the greenhouse gas CO. Vegetable oil production would have to increase substantially to replace gasoline and diesel. With current technology such an increase in production would have a substantial environmental impact. In some poor countries the rising price of vegetable oil is causing problems. There are those that say using a food crop for fuel sets