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
Rivers and Harbors Act of 1965 projects in Rhode Island, New Jersey, South Carolina, Florida, Illinois, and Hawaii. The Act authorized surveys of 19 rivers and bodies of water, including the Great Lakes, Saint Lawrence Seaway and the Gulf Intracoastal Waterway. The Act authorized a complete investigation by the Corps of Engineers of the Chesapeake Bay basin in all aspects, to include navigation, fisheries, flood control, aquatic plants, water quality, water supply, beach erosion, and recreation. each of which deal with water resource issues. Rivers and Harbors Act of 1965 The Rivers and Harbors Act of 1965, Title III of , was enacted October 27, 1965,