Hydroelectric Power Comes from the Kinetic Energy of Flowing Water

HYDROELECTRIC POWER COMES FROM THE KINETIC ENERGY OF FLOWING WATER 

O l EC is limited to regions where differences between ocean surface temperatures and deepwater temperatures are greatest. Fleets of floating offshore rigs have been proposed, with the electricity generated used to produce transportable hydrogen fijel made from seawater. Onshore OTEC plants are best suited for i.slands, such as Hawaii, Guam, and Puerto Rico, where deep waters are relatively 

GEOTHERMAL ENERGY COMES FROM EARTH S INTERIOR 

Hydrothermal plants produce electric power at a cost competitive with the cost of power from fossil fuels. Besides generating electricity, hydrothermal energy is used directly to heat buildings. Acro.ss the United States, geothermal hot-water reservoirs are much more common than geothermal steam reservoirs. Most of the untapped hot-water reservoirs are in C.alifornia, Nevada, Utah, and New Mexico. Fhe temperatures of these reservoirs are not hot enough to drive stc am turbines efficiently, but the water is used to boil a secondary fluid, such as butane, whose vapors then drive gas turbines. 

Rtgions of rlie United Stales where the prospects for geodicr-nial energy arc greatest. 

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