Hydro Power My alternative power source is Hydro power. It comes from water. The oldest and simplest form was the water wheel first used in ancient Greece for grinding grain. The water wheel design was changed by Jean Victor Poncelet in the 18th century. He made the blades curved which raised the efficiency by 70 percent. The water wheel was now called a hydraulic turbine. The turbine is a rotary engine that changes the energy of …showed first 75 words of 295 total…

…showed last 75 words of 295 total…Public Utilities Regulatory Policies Act. The law says that utility companies by electrical power from small power produces from hydroelectric plants. The largest hydroelectric power plant in the United States is the Grand Coulee. Which has a capacity of 7,600 megawatts. The total usable hydro power of the world is estimated at 2,789,000 megawatts of which only 15 percent is being used now. The future of Hydro power looks good because of the problems from using fossil fuels.