(1) pollution clean-up: e.g. clean-up of oil spills and detoxification of contaminated soil; treatment of domestic and industrial waste-water supplies.
(2) pollution control: e.g. recovery of heavy toxic metals from mining water; use of enzymes rather chlorine in pulp and paper manufacture.
(3) ) pollution control: e.g. closed cycling practice at enzyme production plant where raw materials are renewable and waste material is a biodegradable sludge which can be used as a local as a local fertilizer