Industrial application of genetic engineering could revolutionize all kinds of products and processes. Genetic engineering may make it possible to decrease reliance on fossil fuels, and could provide alternative energy sources. Genetically engineered fuels are easier on the environment than fossil fuels. Another use of genetic engineering in industry is finding used in manufacturing processes. Industries are investigating ways to genetically engineer proteins and enzymes to do the work of the chemicals. Genetically engineered microbes also are used to make substances that can be converted to polymers such as polyester, for use in bedding, and other product. Among the most important achievements have been the productions of modified bacteria that devour hydrocarbons. These microbes are used to destroy oil slicks.