alternative sources of energy eliška dlouhá v8a. alternative sources of energy reduce our...
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Alternative sources of energy
Eliška DlouháV8A
Alternative sources of energy
• reduce our dependance on fossil fuels• renewable • environmental friendly• no pollution
Solar energy
• ineffective - only 30%• passive - duration, position, sun’s rays intensity• active - electrical technology
- solar panels • no pollution, no care• ineffective in colder regions
Wind energy
• windmill• family energy needs, industrial uses (wind farms)• no air pollution• low cost• windy areas• noisy• kill birds
Hydroelectric energy
• largest producer • dams, water mills• constant, predictable, controllable• no greenhouse gases• huge costs to build• prevent the migration of fish• tidal power
Geothermal energy
• from beneath the earth• magma → heat → boil water → steam → turns the turbines• no pollution, effective• suitable for particular region • harmful gases • huge installation cost
Summary
• solar energy• wind energy• hydroelectric energy• geothermal energy• biomass energy• hydrogen• every source suitable for different area
Sources
• http://www.conserve-energy-future.com/AlternativeEnergySources.php, 23. 2. 2015
• http://www.altenergy.org/, 23. 2. 2015
• http://en.wikipedia.org/wiki/Renewable_energy, 23. 2. 2015
• http://saveenergy.about.com/od/alternativeenergysources/a/altenergysource.htm, 23. 2. 2015
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