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Global Warming And Your Car | Car Talk - 0 views

www.cartalk.com/...global-warming-and-your-car-0 cost fossil fuels
shared by dpurdy on 23 Mar 13 - No Cached
  • Burning one gallon of gas creates 20 pounds of carbon dioxide, and the average car emits about six tons of carbon dioxide every year
  • So... let's accept that global warming is caused by greenhouse gasses, chief among them carbon dioxide. Cars emit carbon dioxide as part of their emissions...
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Discovery Kids :: Tell Me - How does a generator work? - 0 views

kids.discovery.com/...how-does-a-generator-work fossil fuels convert fossil
shared by dpurdy on 19 Mar 13 - No Cached
  • . It does this by using a magnet that forces electrons to move along a wire at a steady rate while putting pressure on them.
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Biofuel Guide - Introduction to Ethanol and Biodiesel - 0 views

biofuelguide.net biofuel convert form cost
shared by dpurdy on 19 Mar 13 - Cached
  • First generation biofuel are those fuel derived from vegetable or animal fats/oils, starch or sugar with the use of modern technology.
    • dpurdy
      dpurdy on 19 Mar 13
       
      Gallons per acre In the perspective of land use and agricultural efficiency, ethanol seems to be a good choice. The reason is that about 420 gallons of ethanol can be generated per acre in contrast to 60 gallons of biodiesel per acre soybeans. Consequently, the cost of soybean oil would significantly increase if biodiesel production is increased as well.
  • 1. Let the base organic material (corn, sugarcane, wheat, etc) pass through a grinding meal to pulverize the selected material. 2. Then, liquefy it by placing the blend of water, grain powder and an enzyme that facilitates the breakdown of the grain compound into a high-heat cooker. 3. Cool it afterwards. Add another enzyme that will facilitate the conversion of starch into sugars which are then fermented, producing alcohol from the cooled mash. 4. Start the fermentation by adding yeast to the sugar mixture. The sugars will be broken down to ethanol (a form of alcohol) and carbon dioxide. 5. Distill the fermented mixture in order for the ethanol to separate from the solids. 6. Get rid of the water from the separated ethanol through a dehydration process.
  • dpurdy on 19 Mar 13
     
    "Cellulose ethanol production is newly discovered experimental processes which can breakdown cellulose in woody fibers. This would only mean that through this method, ethanol from crop wastes, trees and grasses can be derived. It is significantly better since trees and grasses require small amount of energy in comparison to grains that must be replanted annually. "
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Why a hydrogen economy doesn't make sense - 0 views

phys.org/news85074285.html fuel cell form
shared by dpurdy on 24 Mar 13 - No Cached
  • dpurdy on 24 Mar 13
     
    How inefficient it is to make hydrogen from electricity
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How much CO2 does one solar panel create? | MNN - Mother Nature Network - 2 views

www.mnn.com/...o2-does-one-solar-panel-create solar co2 fossil fuels
shared by dpurdy on 06 Apr 13 - Cached
  • solar panels are at least 20x better on the climate than coal, kWh for kWh.
  • Based on that study, solar PV works out to about 50g of CO2 per kWh compared to coal's 975g of CO2 per kWh, or about 20x "cleaner."
  • dpurdy on 06 Apr 13
     
    Comparison of CO2 from photovoltaics and coal. 
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Solar Power Energy Information, Solar Power Energy Facts - National Geographic - 0 views

environment.nationalgeographic.com/...solar-power-profile solar co2
shared by sokolkyl00 on 29 Oct 12 - No Cached
  • Every hour the sun beams onto Earth more than enough energy to satisfy global energy needs for an entire year. Solar energy is the technology used to harness the sun's energy and make it useable. Today, the technology produces less than one tenth of one percent of global energy demand.
  • In one technique, long troughs of U-shaped mirrors focus sunlight on a pipe of oil that runs through the middle. The hot oil then boils water for electricity generation. Another technique uses moveable mirrors to focus the sun's rays on a collector tower, where a receiver sits. Molten salt flowing through the receiver is heated to run a generator.
  • Despite the drawbacks, solar energy use has surged at about 20 percent a year over the past 15 years, thanks to rapidly falling prices and gains in efficiency. Japan, Germany, and the United States are major markets for solar cells. With tax incentives, solar electricity can often pay for itself in five to ten years.
  • ...1 more annotation...
  • Solar energy is lauded as an inexhaustible fuel source that is pollution and often noise free. The technology is also versatile.
  • valentivin99 on 29 Oct 12
     
    " Today, the technology produces less than one tenth of one percent of global energy demand."
  • kennedyeri98 on 11 Mar 13
     
    Intriguing facts about the suns energy on how they use it on oil and the drawback 
  • bondycal00 on 26 Sep 13
     
    Every hour the sun beams onto Earth more than enough energy to satisfy global energy needs for an entire year. Solar energy is the technology used to harness the sun's energy and make it useable. Today, the technology produces less than one tenth of one percent of global energy demand.
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MIT's artificial leaf is ten times more efficient than the real thing (Wired UK) - 0 views

www.wired.co.uk/...artificial-leaf solar hydrogen how sustainable
shared by dpurdy on 24 Oct 12 - No Cached
  • The device is an advanced solar cell, no bigger than a typical playing card, which is left floating in a pool of water. Then, much like a natural leaf, it uses sunlight to split the water into its two core components, oxygen and hydrogen, which are stored in a fuel cell to be used when producing electricity.
  • dpurdy on 24 Oct 12
     
    This is an amazing breakthrough in developing hydrogen.
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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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Group items tagged pollution - qmstech2 | Diigo Groups - 0 views

groups.diigo.com/...pollution location mrpurdy
shared by filionmar99 on 22 Oct 12 - No Cached
    • filionmar99
      filionmar99 on 22 Oct 12
       
      read this
  • The major challenge to using wind as a source of power is that it is intermittent and does not always blow when electricity is needed. Wind cannot be stored (although wind-generated electricity can be stored, if batteries are used), and not all winds can be harnessed to meet the timing of electricity demands. Further, good wind sites are often located in remote locations far from areas of electric power demand (such as cities).
  • Although wind power plants have relatively little impact on the environment compared to fossil fuel power plants, there is some concern over the noise produced by the rotor blades, aesthetic (visual) impacts, and birds and bats having been killed (avian/bat mortality) by flying into the rotors. Most of these problems have been resolved or greatly reduced through technological development or by properly siting wind plants.
  • ...1 more annotation...
  • A Renewable Non-Polluting Resource Wind energy is a free, renewable resource, so no matter how much is used today, there will still be the same supply in the future. Wind energy is also a source of clean, non-polluting, electricity. Unlike conventional power plants, wind plants emit no air pollutants or greenhouse gases. According to the U.S. Department of Energy, in 1990, California's wind power plants offset the emission of more than 2.5 billion pounds of carbon dioxide, and 15 million pounds of other pollutants that would have otherwise been produced. It would take a forest of 90 million to 175 million trees to provide the same air quality.
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Biofuels | BP - 0 views

www.bp.com/sectiongenericarticle800.do future change
shared by handste99 on 22 Oct 12 - No Cached
  • Biofuels
  • We are working to produce biofuels that are low cost, low carbon, sustainable and able to fulfil the world’s transportation fuel needs on a large scale without compromising food production
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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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Pros & Cons of Solar Energy - 0 views

www.clean-energy-ideas.com/..._and_cons_of_solar_energy.html pollution
shared by ackleysam99 on 22 Oct 12 - Cached
  • Solar panels give off no pollution, the only pollution produced as a result of solar panels is the manufacturing of these devices in factories, transportation of the goods, and installation.
  • he production of energy from the use of fossil and some renewable fuels (e.g. wind turbines) can be noisy, yet solar energy produces electricity very
  • quietly
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Solar energy 'cheaper than fossil fuels in 5 years' - 0 views

www.lowcarboneconomy.com/...3442 cost
shared by ackleysam99 on 22 Oct 12 - No Cached
  • Speaking to Silicon.com, the author of The Age of Intelligent Machines, said that nanotechnology could help solve the world's energy crisis and make solar technology cheaper.
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Biofuels: Journey to Forever - how to make your own clean-burning biofuel - 0 views

journeytoforever.org/biofuel.html biofuel
shared by janosjus99 on 22 Oct 12 - Cached
    • janosjus99
      janosjus99 on 22 Oct 12
       
      history on bio fuels
  • but if everyone had cars like ours, there'd be no need for roads."
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Biofuels - 0 views

www.voxsolaris.com/biofuels.html cost
shared by pettitmat99 on 22 Oct 12 - No Cached
  • Biofuels are basically any fuel that can be burned in air to produce heat that is produced by biological means, normally by plant growth. Currently the most prominant biofuels are ethanol and bio-deisel because these can be burned in existing internal combustion engines and are thus a direct replacement for oil. The most important biofuel historically is wood with oth
  • Biofuels are currently cheaper than oil although this is only because we are seeing very high oil prices at the moment. Under what might be termed more 'normal' market conditions, biofuels lack any meaningful price advantage. Biofuel production is very labor intensive and very land intensive. Production of ethanol from sugar cane was pioneered by the Brazilians in the 1970's as a solution to an oil import bill they could ill afford. It worked for them as they have plenty of land they can convert to growing sugar cane and at the time, plenty of cheap labor with which to harvest it.
  • he simple truth is the world does not have enough land to produce anywhere near the quantity of biofuels we need to make any dent in our oil consumption. They are only in fashion now oil prices are high and it is cost effective to produce them. Sooner or later food prices will rise to such a point that biofuel production will cease to be economic.
  • ...2 more annotations...
  • In any case the current price of oil is unlikely to be sustained. Much of today's oil prices can be attributed to the geopolitical situation in the Middle East and the hording of oil both for security of supply and more recently as a hedge against the falling dollar.
  • e they cheaper than oil? That depends how you calculate the cost!
  • pettitmat99 on 22 Oct 12
     
    "But herein lies the first problem with biofuels. They may be carbon nuetral but they are certainly not as green as they might be. Not if the land to grow sugar is coming from cutting down the Amazon jungle and not if vast quantities o"
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Wave Energy Pros and Cons - Tidal and Ocean Wave Power Still Niche Technologies | Green... - 2 views

www.greenworldinvestor.com/...power-still-niche-technologies pros wave energy
shared by hughesacam99 on 22 Oct 12 - No Cached
  • Wave Power is quite immature,costly and unproven in large scale. While some companies have made good progress, the technology remains largely unproven and has only been put to actual test in pilot cases.
  • While Wave Energy has been known since the 1700s the progress has been extremely slow.
  • One of the biggest problems of Renewable Power is that it is intermittent in nature as it generates energy only when there are waves. This problem can be solved with energy storage however this leads to additional costs.
  • ...8 more annotations...
  • Severe Weather like Storms and Typhoons can be quite devastating on the Wave Power Equipment especially those place on the Sea Floor.
  • This is a disadvantage which is common to all  the 3 types of Water based Energy that is Tidal, Hydro and Waver Energy. Some forms of Energy are just better suited to some places.
  • Wave Power generate power quite far away from the consumption of electricity. Transportation of Wave Energy can be quite cumbersome and expensive. Some Wave Energy Generators are converting power at the bottom of the ocean or far away from the shoreline. Moving that power towards where it is used can be difficult.
  • The sight of wave generators around the shoreline can look quite ugly and cause loss of tourism potential around shorelines. Also local residents can have problems even with wave power equipment which is not far offshore. The Cape Wind Energy project off the shore of Massachusetts has been delayed by over 10 years as it has drawn serious objections from the owners of coastal homes about loss in their property values.
  • A Wave Power Plant can cost around$6-10 million million to be spent in building 1 Megawatt.
  • Waver Energy does not require any fuel like most other sources of energy
  • Wave Energy is powered by the waves of the ocean which are totally free just like Wind and Sunlight.
  • Wave Energy Generators can be installed in various sizes with as little as 1 MW. This is not possible for other energy forms which require a minimum large size such as Coal, Nuclear etc.
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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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Group items matching "change future" in title, tags, annotations or url - qmstech2 | Di... - 0 views

groups.diigo.com/...search biofuel future change
shared by filionmar99 on 24 Oct 12 - No Cached
  • We are working to produce biofuels that are low cost, low carbon, sustainable and able to fulfil the world’s transportation fuel needs on a large scale without compromising food production
2More

NREL: Hydrogen and Fuel Cells Research - Renewable Electrolysis - 0 views

www.nrel.gov/...renew_electrolysis.html use renewable sustainable hydrogen
shared by giumarraant99 on 24 Oct 12 - No Cached
  • Renewable electrolysis is a process that uses renewable electricity to produce hydrogen by passing an electrical current through water. Renewable energy sources such as photovoltaics, wind, biomass, hydropower, and geothermal can provide clean, sustainable electricity for our nation
  • Wind turbines can be used to produce hydrogen through a process called renewable electrolysis.
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