Who: Heron of Alexandria When: 1st century (AD)Why: a machine which harnesses wind energy for a purpose like grinding grain, pumping water, or generating electricityWhere: EnglandHow: When there is no wind, electricity must be produced in alternative ways

Windmill

Who: Prince Piero Ginori CotiWhen: Early 1900’sWhy: to provide large amounts of electricity Where: ItalyHow: an electrical energy generated by harnessing the power contained in the earth’s internal heat

Geothermal Power

Who: Charles FrittsWhen: 1980’sWhy: used as a component of a larger photovoltaic system to generate and supply electricity in commercial and residential applicationsWhere: CaliforniaHow: converts sunlight into energy

Solar Power

Who: Lester PeltonWhen: late1880’sWhy: used for milling of lumber and grain and for pumping irrigation waterWhere: Appleton, WisconsinHow: Hydroelectric

power uses the kinetic energy of moving water to make electricity

Hydroelectric Power

Who: Yoshio MasudaWhen: 1940Why: to do useful works like electricity generation, water desalination, or the pumping of waterWhere: ParisHow: the transport of energy by ocean surface waves, and the capture of that energy to do useful work

Wave Power