cheapest with Nuclear energy coming next, and oil and gas the most expensive. The amount of energy is usually decided by the morning weather report. If electricity is more demand because it is hot. In the summer time all electricity uses are out to there limit. In 1977 Con Edison redesigned their whole system. They made turbines that were controlled by remote instead of operated by a person, if the power would go down the computer would go on to make sure the sys!
             Unlike most cities New York City's water is untreated except by chlorination. In the 1800's, water became polluted. Allen Burr established a water company. Finally, a reliable municipal water thing was available. Gravity alone pulled the water down. In the past, New York City had an abundant supply of fresh, clean water. New York drinks from over 18 reservoirs spread over a watershed. Water traveled through the city through a chain of reservoirs.
             A black and white sekki disk is dropped in the water. This particular piece of equipment can spot allergies and other germs. The water would be considered good drinking water if it were visible at two meters. Mot of the water contamination comes from fertilizers and animal wastes that wash down from pavements, lawns, and sewers and run into the rivers.
             Ninety percent of the water within New York City comes from The Hill view reservoirs in the Bronx. The map shows the hills and streams of Manhattan.
             In the Nineteenth Century, Aaron Burr built a reservoir in Chambers, which is currently the location of one of the highly known New York Public Library in New York City. In 1837, an aqua duct was made over and under the Harlem River. The Aqua Duct was thirty-three miles. T
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