Food V/S Fuel

Some propose that fuel only be made from non-edible vegetable oils such as Camelina, Jatropha or seashore mallow which can thrive on marginal agricultural land where many trees and crops will not grow, or would produce only low yields. Others argue that the problem is more fundamental. Farmers may switch from producing food crops to producing biofuel crops to make more money, even if the new crops are not edible