Cyanotoxin which is why they are usually green or blue. Cyanobacteria are found almost everywhere; in oceans, lakes and rivers as well as on land. They flourish in Arctic and Antarctic lakes, hotsprings and wastewater treatment plants. They even inhabit the fur of polar bears, to which they impart a greenish tinge. Cyanobacteria produce potent toxins, but they also produce helpful bioactive compounds, including substances with antitumour, antiviral, anticancer, antibiotic and antifungal activity, UV protectants and specific inhibitors of enzymes. Cyanotoxins are often implicated in what are commonly called "red tides" or "harmful algal blooms". Lakes and oceans contain many single-celled
Great Lakes Areas of Concern With the realization of the sea lamprey explosion in the Great Lakes, the Great Lakes Fishery Commission was created to control the situation. In 1994 the Ecosystem Charter for the Great Lakes- St. Lawrence Basin was suggested as a good faith agreement. This was an agreement to use the ecosystem as a method of management for the Great Lakes. The Air Quality Agreement was put into place to help protect the health of not only the ecosystems of the Great Lakes but the citizens who live around them as well. It limits the amount of toxic chemicals that are given