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What environmental benefits does tidal energy have compared to the traditional fossil f... - 0 views

www.answerbag.com/721036 tidal form fossil fossil fuel fuel
shared by smithkai143 on 29 Oct 12 - No Cached
  • A benefit is very little pollution. However, there is a very serious potential draw back. It can be very hard of fish populations. The proposal for tidal power is to put turbines on the bottom of a bay and let the water rushing in and out with the tide turn them and generate electricity. However, along with the water will come fish and other marine animals. What do you think will happen when these critters get sucked into the turbines. Can you say sushi, boys and girls? Putting some kind of screen in front of the turbine to prevent this would just mean that the animals would be sucked up against the screens, obstructing the flow of water through the turbines.
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List of Tidal Power Plants and Future Tidal Stations- Facing Difficult Times | Green Wo... - 0 views

www.greenworldinvestor.com/...tations-facing-difficult-times tidal future
shared by dpurdy on 30 Oct 12 - No Cached
  • Except for South Korea,not other government in the world is really pushing Tidal Wave Energy which needs massive government support at this stage of development.
  • Tidal Technology is still in the baby phase
  • Most of the tidal power plants using the modern tidal turbine technology are still in the pilot phase and generate negligible power.However tidal power stations have the potential to generate large amounts of energy in a non-polluting way
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Fuel Cell Vehicles - 0 views

www.fueleconomy.gov/...fuelcell.shtml hydrogen pollution
shared by mosherrya99 on 22 Oct 12 - No Cached
  • FCVs run on hydrogen gas rather than gasoline and emit no harmful tailpipe emissions.
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Wave & Tidal Energy Technology | Renewable Northwest Project - 0 views

www.rnp.org/...wave-tidal-energy-technology wave current
shared by sopranodan99 on 22 Oct 12 - No Cached
  • Potential
  • Wave energy resources are best between 30º and 60º latitude in both hemispheres, and the potential tends to be the greatest on western coasts
  • While no commercial wave or tidal projects have yet been developed in the United States, several projects are planned for the near future, including projects in the Northwest
  • ...7 more annotations...
  • ‘Pelamis’ wave energy conversion devices and generates a combined 2.25 MW of electricity. OPD plans to expand the facility to produce 22.5 MW in 2007
  • The United States receives 2,100 terawatt-hours of incident wave energy along its coastlines each year, and tapping just one quarter of this potential could produce as much energy as the entire U.S. hydropower system.
  • Total Annual U.S. Incident Wave Energy 2,110 terrawatt-hours
  • The United States receives 2,100 terawatt-hours of incident wave energy along its coastlines each year, and tapping just one quarter of this potential could produce as much energy as the entire U.S. hydropower system
  • In addition to its abundant solar, wind and geothermal resources, the Pacific Northwest is also uniquely situated to capture the renewable energy of the ocean. Special buoys, turbines, and other technologies can capture the power of waves and tides and convert it into clean, pollution-free electricity. Like other renewable resources, both wave and tidal energy are variable in nature. Waves are produced by winds blowing across the surface of the ocean. However, because waves travel across the ocean, their arrival time at the wave power facility may be more predictable than wind. In contrast, tidal energy, which is driven by the gravitational pull of the moon and sun, is predictable centuries in advance.
  • The United States receives 2,100 terawatt-hours of incident wave energy along its coastlines each year, and tapping just one quarter of this potential could produce as much energy as the entire U.S. hydropower system
  • The Unit
  • mchughkon99 on 15 Mar 13
     
    the amount of 1/4 of energy around the coasts could be equal to the amount energy produced by hydropower
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Green Rock Energy - Geothermal Energy - Sustainability - 0 views

www.greenrock.com.au/geothermalSustainability.php geothermal sustainable
shared by brownale99 on 22 Oct 12 - No Cached
  • The Benefits "Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power. Depending on the nature of the resource and the reservoir, individual production wells have the potential to generate consistent supplies of base load power for decades."
  • Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power.
  • individual production wells have the potential to generate consistent supplies of base load power for decades.
  • ...2 more annotations...
  • Base load electricity generated from geothermal energy is clean, renewable and has minimal impact on the environment.
  • Unlike burning fossil fuels, the process emits no greenhouse gases, pollution or hazardous wastes.
  • messinaaar98 on 22 Oct 12
     
    "The Benefits "Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power. Depending on the nature of the resource and the reservoir, individual production wells have the potential to generate consistent supplies of base load power for decades.""
  • gazdiknic99 on 11 Mar 13
     
    main idea, supporting facts, and conclusion
  • brownale99 on 11 Mar 13
     
    ""Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power. Depending on the nature of the resource and the reservoir, individual production wells have the potential to generate consistent supplies of base load power for decades.""
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Tidal Energy Pros and Cons - Energy Informative - 0 views

energyinformative.org/tidal-energy-pros-and-cons tidal advantages disadvantages cost
shared by dpurdy on 22 Oct 12 - No Cached
  • This ultimately reduces the cost these power plants can sell their electricity
  • It is important to realize that the methods for generating electricity from tidal energy is a relatively are relatively new technologies
  • Tidal Energy is a renewable energy source. This energy source is a result of the gravitational fields from both the sun and the moon, combined with the earth’s rotation around its axis, resulting in high and low tides.
  • ...1 more annotation...
  • In addition to being a renewable energy, it does not emit any climate gases and does not take up a lot of space
  • buherjac99 on 22 Oct 12
     
    pollution
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Energy from Wind Power - 0 views

www.climatechangechallenge.org/...Energy-from-Wind-Power.htm wind sustainable
shared by bannonmel99 on 22 Oct 12 - No Cached
  • Wind energy is a pollution-free, infinitely sustainable form of energy. It doesn’t use fuel; it doesn’t produce greenhouse gasses and it doesn’t produce toxic or radioactive waste.
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Describe Two Different Energy Alternatives To... | Chegg.com - 1 views

www.chegg.com/...natives-fossil-fuels--q3091004 alternatives fossil
shared by slentzkel99 on 26 Oct 12 - No Cached
  • Difference Between Alternative Energies (Ae) And Fossil Fuels essential difference between alternative energies (AE) and fossil fuels? Alternative energies will not have a lot of pollution, but fossil fuels will cause some..
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HowStuffWorks "How Fuel Cells Work" - 0 views

auto.howstuffworks.com/...fuel-cell.htm fuel cell sustainable
shared by Connor Wiggins on 15 Mar 12 - Cached
  • This initiative, supported by legislation in the Energy Policy Act of 2005 (EPACT 2005) and the Advanced Energy Initiative of 2006, aims to develop hydrogen, fuel cell and infrastructure technologies to make fuel-cell vehicles practical and cost-effective by 2020
  • Why are governments, private businesses and academic institutions collaborating to develop and produce them? Fuel cells generate electrical power quietly and efficiently, without pollution. Unlike power
  • that use fossil fuels, the by-products from an operating fuel cell are heat and water
  • ...5 more annotations...
  • With a fuel cell, chemicals constantly flow into the cell so it never goes dead -- as long as there is a flow of chemicals into the cell, the electricity flows out of the cell. Most fuel cells in use today use hydrogen and oxygen as the chemicals.
  • If you want to be technical about it, a fuel cell is an electrochemical energy conversion device. A fuel cell converts the chemicals hydrogen and oxygen into water, and in the process it produces electricity.
  • polymer electrolyte membrane fuel cells (PEMFC)
  • United States has dedicated more than one billion dollars to fuel cell research and development so far.So what exactly is a fuel cell,
  • With a fuel cell, chemicals constantly flow into the cell so it never goes dead -- as long as there is a flow of chemicals into the cell, the electricity flows out of the cell. Most fuel cells in use today use hydrogen and oxygen as the chemicals.
  • ricciardellinick on 08 Mar 13
     
    "In 2003, President Bush announced a program called the Hydrogen Fuel Initiative (HFI) during his State of the Union Address."
  • Connor Wiggins on 11 Mar 13
     
    It shows how its sustainable 
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Solar Panels: Tomorrow's Toxic Waste? | Mother Jones - 0 views

motherjones.com/...are-your-solar-panels-toxic disadvantages solar pollution
shared by efana1 on 15 Mar 12 - No Cached
  • their products contain lead, a potent neurotoxin
  • contain cadmium, a known carcinogen.
  • nitrogen triflouride, a potent greenhouse gas
  • ...1 more annotation...
  • 1.5 billion pounds of solar panel waste containing 2 million pounds of lead and 600,000 pounds of cadmium will be disposed of in California alone.
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Disadvantages of Wind Energy - Don't Get Blown Away by All The Positives of Wind - 2 views

www.alternative-energy-resources.net/advantages-of-wind-energy.html disadvantages turbines impact wind pollution cost location
shared by shannonlan97 on 15 Mar 12 - No Cached
  • 3.Wind Turbines Interfere with Television Reception.
  • Some of these blades can have a span of 100 or more feet.
  • birds easily fly into the blade path and get killed.
  • ...2 more annotations...
  • get about a hundred of these "bad boys" cranking out a few hundred RPM's and you might have the sound of an alien attack.
  • If you do live along the coast, your personal property is rather expensive and you might not be able to afford the opportunity to afford the land, let alone a wind generator.
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About Wind Energy: Benefits of Wind - 3 views

www.pawindenergynow.org/...benefits.html wind energy benefits
shared by buttlingzac97 on 15 Mar 12 - Cached
  • Wind energy releases no pollution into the air or water, and does not contribute to global warming
  • "on average, each MWh of electricity generated in the U.S. results in the emission of 1,341 pounds of carbon dioxide (CO2)
  • his avoided CO2 equals over 1.8 million tons of carbon, enough to fill 180 trains, each 100 cars long, with each car holding 100 tons of carbon every year."
  • ...1 more annotation...
  • iversifies the national energy portfolio and reduces America's reliance on imported fuels
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Disadvantages Of Solar Energy - 2 views

www.clean-energy-ideas.com/...dvantages_of_solar_energy.html
shared by ackleysam99 on 15 Mar 12 - Cached
  • One of the main disadvantages is the initial cost of the equipment used to harness the suns energy
  • A solar energy installation requires a large area for the system to be efficient in providing a source of electricity
  • pollution can degrade the efficiency of photovoltaic cells. Clouds also provide the same effect, as they can reduce the energy of the suns rays
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Biofuel - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Biofuel biofuel pollution
shared by eldredzac98 on 13 Mar 12 - No Cached
  • Lignocellulosic biofuels are predicted by oil industry body CONCAWE [1] to reduce greenhouse gas emissions by around 90% when compared with fossil petroleum, in contrast first generation biofuels were found to offer savings of 20-70%
  • eldredzac98 on 13 Mar 12
     
    Lignocellulosic biofuels are predicted by oil industry body CONCAWE [1] to reduce greenhouse gas emissions by around 90% when compared with fossil petroleum, in contrast first generation biofuels were found to offer savings of 20-70%
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Wind Turbines Make People Sick with Noise and "Strobe Effect" - 1 views

karbon.xomba.com/k_with_noise_and_strobe_effect disadvantages wind pollution
shared by efana1 on 13 Mar 12 - No Cached
  • The NOISE and the strobe-like light effect that blades generate while they spin in daylight make a lot of people sick.
  • increase depression and may cause a serious health risk for people suffering from anxiety and epileptic seizures.
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New Platinum Could Mean Cheaper, More Efficient Fuel Cells - 0 views

www.alternative-energy-news.info/aper-more-efficient-fuel-cells fuel cells hydrogen pollution
shared by bartontri97 on 13 Mar 12 - No Cached
  • Fuel cells are electrochemical devices that transform the chemical energy of a fuel into electricity generating water as a by-product.
  • Fuel cells use hydrogen and oxygen to complete their energy-producing reactions.
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Wind power - Wikipedia, the free encyclopedia - 1 views

en.wikipedia.org/Wind_power power
shared by rutalil00 on 13 Mar 12 - Cached
  • Wind power is the conversion of wind energy into a useful form of energy, such as using wind turbines to make electricity, windmills for mechanical power, windpumps for water pumping or drainage, or sails to propel ships
  • Wind power is the conversion of wind energy into a useful form of energy, such as using wind turbines to make electricity, windmills for mechanical power, windpumps for water pumping or drainage, or sails to propel ships.
  • The total amount of available power from the wind is considerably more than present human power use from all sources.[3] At the end of 2011, worldwide nameplate capacity of wind-powered generators was 238 gigawatts (GW), growing by 41 GW over the preceding year.[4] Wind power now (2010 data) has the capacity to generate 430 TWh annually, which is about 2.5% of worldwide electricity usage.[5][6] Over the past five years (2010 data) the average annual growth in new installations has been 27.6 percent. Wind power market penetration is expected to reach 3.35 percent by 2013 and 8 percent by 2018.[7][8] Several countries have already achieved relatively high levels of wind power penetration, such as 21% of stationary electricity production in Denmark,[5] 18% in Portugal,[5] 16% in Spain,[5] 14% in Ireland[9] and 9% in Germany in 2010.[5][10] As of 2011, 83 countries around the world are using wind power on a commercial basis
  • ...8 more annotations...
  • A large wind farm may consist of several hundred individual wind turbines which are connected to the electric power transmission network. Offshore wind power can harness the better wind speeds that are available offshore compared to on land, so offshore wind power’s contribution in terms of electricity supplied is higher.[11] Small onshore wind facilities are used to provide electricity to isolated locations and utility companies increasingly buy back surplus electricity produced by small domestic wind turbines. Although a variable source of power, the intermittency of wind seldom creates problems when using wind power to supply up to 20% of total electricity demand, but as the proportion rises, increased costs, a need to use storage such as pumped-storage hydroelectricity, upgrade the grid, or a lowered ability to supplant conventional production may occur.[12][13][14] Power management techniques such as excess capacity, storage, dispatchable backing supply (usually natural gas), exporting and importing power to neighboring areas or reducing demand when wind production is low, can mitigate these problems.
  • Wind power, as an alternative to fossil fuels, is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation, and uses little land. In operation, the overall cost per unit of energy produced is similar to the cost for new coal and natural gas installations.[15] The construction of wind farms is not universally welcomed, but any effects on the environment from wind power are generally much less problematic than those of any other power source
  • Wind is the movement of air across the surface of the Earth, affected by areas of high pressure and of low pressure.[35] The surface of the Earth is heated unevenly by the Sun, depending on factors such as the angle of incidence of the sun's rays at the surface (which differs with latitude and time of day) and whether the land is open or covered with vegetation. Also, large bodies of water, such as the oceans, heat up and cool down slower than the land. The heat energy absorbed at the Earth's surface is transferred to the air directly above it and, as warmer air is less dense than cooler air, it rises above the cool air to form areas of high pressure and thus pressure differentials. The rotation of the Earth drags the atmosphere around with it causing turbulence. These effects combine to cause a constantly varying pattern of winds across the surface of the Earth.[35]
  • Wind power is the conversion of wind energy into a useful form of energy, such as using wind turbines to make electrical power, windmills for mechanical power, wind pumps for water pumping or drainage, or sails to propel ships.
  • Compared to the environmental impact of traditional energy sources, the environmental impact of wind power is relatively minor in terms of pollution
  • Wind energy is the kinetic energy of air in motion, also called wind
  • ind power, as an alternative to fossil fuels, is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation and uses little land.[2] The effects on the environment are generally less problematic than those from other powe
  • Wind power is very consistent from year to year but has significant variation over shorter time scales. The intermittency of wind seldom creates problems when used to supply up to 20% of total electricity demand,[5] but as the proportion increases, a need to upgrade the grid, and a lowered ability to supplant conventional production can occur.
  • krolnik98 on 13 Mar 12
     
    wind turbine stuff
  • pondalb98 on 11 Mar 13
     
    "Wind power is the conversion of wind energy into a useful form of energy, such as using wind turbines to make electrical power, windmills for mechanical power, wind pumps for water pumping or drainage, or sails to propel ships."
  • rutalil00 on 24 Sep 13
     
    Wind power, as an alternative to fossil fuels, is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation and uses little land.[2] The effects on the environment are generally less problematic than those from other power sources. As of 2011, Denmark is generating more than a quarter of its electricity from wind and 83 countries around the world are using wind power on a commercial basis.[3] In 2010 wind energy production was over 2.5% of total worldwide electricity usage, and growing rapidly at more than 25% per annum. The monetary cost per unit of energy produced is similar to the cost for new coal and natural gas installations.[4]
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