Biotechnology is the application of biotechnology for the industrial processing and production of chemicals, materials and fuels. It relies on manipulating and growing bacteria, yeast, and filamentous fungi to generate industrially useful products in a more efficient way (e.g. less energy use or less by-products), or generate substances and chemical building blocks with specific capabilities that conventional petrochemical processes cannot provide. There are many examples of such bio-based products already on the market. The most mature applications are related to enzymes used in the food, feed and detergents sectors. More recent applications include the production of biochemicals and biopolymers from agricultural or forest wastes.