The mightiest of all ocean currents, the Circumpolar Current, flows in a complete circle around Antarctica. Sometimes major water currents change when winds weaken or blow in a different direction. One well-studied change is El Nino, the occurrence of warm water current off the coast of Ecuador and Peru. In addition to changing normal weather patterns, the warmer, nutrient-poor water affects animal life in the sea and on land. During the 1982-1983 El Nino event off South America, seabirds abandoned their nests, a fourth of the seal and sea lion population died, and the anchovy fisheries collapsed.
Every drop is precious.
Even though water covers three-quarters of the earth's total surface, less than half of one percent is available fresh water. How we use water. How we use water can make the difference between polluted, unusable water and water that can be renewed through the water cycle. We can reduce runoff pollution by keeping harmful chemicals like paint thinners, solvents, and old car oil out of storm drains. Always dispose of indoor cleaning solutions in a proper manner and use the least amount of lawn and garden fertilizers.