But we have not used our waters well. Our major rivers are...

But we have not used our waters well. Our major rivers are defiled by noxious debris. Pollutants from cities and industries kill the fish in our streams. Many waterways are covered with oil slicks and contain growths of algae that destroy productive life and make the water unfit for recreation. "Polluted Water-No Swimming" has become a familiar sign on too many beaches and rivers. A lake that has served many generations of men now can be destroyed by man in less than one generation.