Savoy cabbage and unusual seasonings such as juniper. Signs of desirable quality include cabbage that is heavy for its size with leaves that are unblemished and have a bright, fresh look. Peak season for most cabbages in the Northern Hemisphere runs from November through April. Fresh whole cabbage will keep in the refrigerator for one to six weeks depending on type and variety. Hard green, white or red cabbages will keep the longest while the looser Savoy and Chinese varieties such as napa and bok choy need to be consumed more quickly. It is necessary to keep the outer leaves intact without
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