Glucose, the body's main fuel, is found in certain foods and also formed by the breakdown of sugars and starches. It may one day be a replacement for benzene, a highly regulated compound that is ubiquitous in the chemical industry (12 billion pounds were produced in the United States in 1993). Benzene helps make jeans blue--it's the feedstock for indigo dye--and ice cream vanilla flavored--it's the source of vanillin. It's also the starting point for a number of important industrial chemicals including hydroquinone, used in film developing, phenol, used to make solvents, and adipic acid, which is used to make nylon. Benzene is also a potent carcinogen.