t's called geothermal energy -- from the Greek words geo, or "earth," and therme, meaning "heat."
HowStuffWorks "How Geothermal Energy Works" - 0 views
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The core, about 4,000 miles (6,437 kilometers) beneath the surface, can reach temperatures of 7,600 degrees Fahrenheit
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(4,204 degrees Celsius).
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Tidal Power - How Tidal Power Plants Work - 0 views
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Tidal power traditionally involves erecting a dam across the opening to a tidal basin. The dam includes a sluice that is opened to allow the tide to flow into the basin; the sluice is then closed, and as the sea level drops, traditional hydropower technologies can be used to generate electricity from the elevated water in the basin. Some researchers are also trying to extract energy directly from tidal flow streams.
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Another form of ocean energy is called tidal energy. When tides comes into the shore, they can be trapped in reservoirs behind dams. Then when the tide drops, the water behind the dam can be let out just like in a regular hydroelectric power plant.
Solar Energy | SEIA - 0 views
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Solar energy is the cleanest and most abundant renewable energy source available, and the U.S. has some of the richest solar resources in the world.
How Much Solar Energy is Used in the World? | Solar Energy Facts - 1 views
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How much solar energy is used in the world? Global capacity for solar energy production reached 39.8 GigaWatts (0.0398 terawatts) in 2010 . Here are the top 10 solar energy producing countries in the world:
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United States (1,650 MW
BBC News - UK tidal power has huge potential, say scientists - 0 views
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Despite high costs, experts say tidal power is more reliable than wind.
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The UK is underestimating the amount of electricity that could be generated from tidal sources, new research says.
Tidal Energy | Marine Current Turbines - 0 views
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idal turbines are very much like an underwater windmill where the blades are driven by consistent, fast-moving currents. The submerged rotors harness the power of the tidal streams to drive generators, which in turn produce electricity. Water is 832 times denser than air so consequently tidal turbine rotors can be are much smaller than wind turbine rotors generate equivalent amounts of electricity, and they can be deployed much closer together. Devices that harness tidal stream energy present a unique set of engineering challenges in terms of design, installation and maintenance. During operation, the force of the tidal flow in Strangford Lough is equivalent to a 345 mph wind generating a 100 tonnes of thrust on the rotors. The unique SeaGen design allows capture of the maximum amount of tidal energy whilst keeping maintenance and connectivity costs low.
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Tidal turbines are very much like an underwater windmill where the blades are driven by consistent, fast-moving currents. The submerged rotors harness the power of the tidal streams to drive generators, which in turn produce electricity. Water is 832 times denser than air so consequently tidal turbine rotors are much smaller than wind turbine rotors generate equivalent amounts of electricity, and they can be deployed much closer together. Devices that harness tidal stream energy present a unique set of engineering challenges in terms of design, installation and maintenance. During operation, the force of the tidal flow in Strangford Lough is equivalent to a 345 mph wind generating a 100 tonnes of thrust on the rotors.
First production hydrogen fuel cell cars hit the market, from Hyundai | ExtremeTech - 0 views
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rather than burning hydrogen in place of gasoline as BMW has done with its internal combustion hydrogen cars. Either way, the only emission is water vapor.
How much greenhouse gas does a solar power system replace? | Solar Powered in Toronto - 1 views
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kilowatt system will replace around 2.5 tonnes of greenhouse gases, possibly more. It depends on what your annual output is, and what the local mix of power sources is in your province/state/country.
How much CO2 does solar energy produce? | Ecooutfitters.net - 0 views
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Let’s not hide the fact that manufacturing solar panels requires resources, fossil fuels that release CO2 emissions and add to our carbon footprint. However, it’s been shown in numerous studies that solar panel production releases nowhere near as much CO2 and other greenhouse gases as electric generated from coal, oil, natural gas, etc. (And you still need to produce the equipment to generate electricity from those sources as well.)
Environment for Kids: Wave and Tidal Energy - 0 views
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There are also three main ways that tidal energy is harnessed: Tidal Barrages - A tidal barrage works like a dam. When the tide goes high, the reservoir fills up. When the tide drops the dam lets the water out. In both directions the moving water can spin the blades of turbines to create electricity. Tidal Fences - These are smaller structures than a barrage. A number of vertical turbines form a fence between two land masses. When the tide moves in or out, the turbines spin and generate electricity. Tidal Turbines - These are individual turbines placed anywhere there is a strong tidal flow.
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Tidal power to turn water wheels and grind grains was used as far back as Roman times and the Middle Ages. The idea of using tidal power for electricity is fairly recent, but the costs have been too high to make it a major energy source. Recent technological advances have shown that it could become a competitive and viable source
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Tidal turbines are more expensive to build and maintain than wind turbines, but produce more energy. They also produce energy more consistently as the tide is continuous while the wind doesn't always blow.
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What Is Geothermal? | GoGoGeo - 0 views
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The short answer to this question is that Geothermal Energy is a type of renewable energy that is generated and stored within the Earth.
What is Solar Energy? - Ask.com Answers - 1 views
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Solar energy is energy that is obtain from the sun. This can be found most common in lights and high tech watches.Solar energy does not work when the sun is not shinning.
Wind Turbines - Kinetic wind energy generator technology - 0 views
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Though our scientists may claim that they are inventing something new by using wind as a source of generating energy, the truth is that wind is being used for centuries for this purpose. An example of this is an article published in 1838, which clearly shows that even in those times, wind was considered an important source of energy. Here are a few quotes that were recorded in the past, which prove that wind was always important in generating energy
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Renewable energy production and demand growth is gaining momentum in many ways across the world. There is a booming demand of wind power today and all wind energy equipment manufacturers are gearing up to meet the demand and take advantage of it. Wind power capacity growth will be reaching 447GW in the next five years and by year 2014 end, Asia will lead the world in installed wind capacity.
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Yes, the day is not far off when reaching for sky is the new motto for generating cost-effective renewable energy. Initially it was considered to be technically non-viable to tap high-altitude winds. But today, technically-advanced materials and innovative computer know-how are giving new life to this scheme with innovative autonomous aerial structures using wind energy to generate power
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Solar Energy Facts - 0 views
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hen a modern day person hears the term “solar energy” they often think about solar panels that are mounted on roofs in sunny neighborhoods. Find out how to slash your electric bill by 75% with little out of pocket expense. Although this is a part of solar energy, there is much more to it.
How Can Wind Be Turned into Electricity - Ask.com - 1 views
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The wind turbine is a rotating machine that turns the kinetic energy of wind into mechanical energy. The energy can then be used by machines or converted into electricity and stored.
HowStuffWorks "10 Incredible Wind Power Facts" - 0 views
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8: One Megawatt of Wind Energy = 2,600 Fewer Tons of Carbon Dioxide So, with all the noise about clean energy, what kind of improvement are we really talking about with wind? Consider that every year 1MW of wind energy can offset approximately 2,600 tons of carbon dioxide (CO2) [source: NREL], and the interest comes into focus. The simple math is less fossil fuel consumption equals less CO2. And measuring carbon reduction has become a key benchmark for monitoring the progress of alternative energy adoption.
Why Is a Solar Panel in New Jersey 15 Times More Valuable Than One in Arizona? - 0 views
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The combined health, environmental, and climate benefits of a solar panel in New Jersey are fifteen times greater than those associated with one in Arizona, and a wind turbine in West Virginia displaces twice as much carbon dioxide as the same turbine would in California.
Articles about Solar Energy - Los Angeles Times - 0 views
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with $25 million set aside for low-income customers. An additional $100.8 million will be used to swap out water heaters powered by electricity.
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NATIONALHawaii sets 'breakthrough' framework for new solar power
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