2 Alternative Energy Sources Solar EnergyWind EnergyHydro EnergyTidal EnergyGeothermal EnergyNuclear EnergyBiomass
3 Solar energySolar electric or photovoltaic (PV) systems convert sunlight (insolation) into electricity.AdvantagesRenewable – carbon neutral30 Year Lifetime, low maintenanceReduced electric billDisadvantagesHigh initial costSlow paybackCan be unreliable unless you're in a very sunny climate.
4 Solar energy Electric Power Capacity (MW) United States970,000Renewable97,000Solar400
5 Wind energyWind power is the conversion of wind energy into a useful form, such as electricity, using wind turbines.Wind AdvantagesRenewable – carbon neutralVery large resourceEconomically competitiveLarge and Small scale applications30 Year LifetimeWind DisadvantagesRegionalIntermittentSome environmental issues
6 Wind energy Electric Power Capacity (MW) US970,000Renewable97,000(10%)Wind6,000
7 Nuclear energyNuclear energy originates from the splitting of uranium atoms in a process called fission. At the power plant, the fission process is used to generate heat for producing steam, which is used by a turbine to generate electricity.AdvantagesNuclear power plants could still produce electricity after coal and oil become scarce.Nuclear power plants need less fuel than ones which burn fossil fuels.No CO2 emissionNo PollutionDisadvantagesnuclear weaponsNuclear accidentNuclear waste disposal problems.Nuclear reactors only last for about forty to fifty years.
8 Nuclear energy Electric Power Capacity (MW) US970,000Nuclear203,700(21%)
9 Geothermal energyGeothermal energy is heat from within the earth.
10 Tidal energyTidal energy is created by the relative motion of the Earth, Moon, Sun, and the gravitational interactions between them.