Solar energy technologies include solar heating solar photovoltaic solar thermal electricity and solar architecture which can make considerable contributions in solving some of the most urgent problems the word is now facing. The international energy agency projected that solar power could provide a third of the global final energy demd after 2060 while carbon dioxide emissions would be reduced to very low levels.
Solar technologies are broadly characterized as either passive solar or active solar depending on the way the capture convert and distributed solar energy. Active solar techniques include the use of photovoltaic panels Nelli's Solar power plant in the United's States one of the largest photovoltaic power plants in North America and solar thermal collectors to harness the energy. Passive solar techniques include orienting a building to the sun selecting with favorable thermal mass or light dispersing properties and designing spaces that naturally circulates air.
Geothermal:
Heat under the ground used to heat water and make steam to turn generator turbine and make electricity.
Super heated water or stream from earth interior utilized in running the turbines of a conventional power plant to generated electricity.
Such plant are usually small and suitable only for the needs of a local community Iceland Italy New Zealand Russia and US are among the few countries having the right sized geothermal energy fields.!!!!
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