Alternative Energy Sources: 4 Technologies on the Brink
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Examine the upside and down of wind, geothermal, solar and synfuel.
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How do we create energy and sustain our environment? A panel of scientists lays it out simply. Conserve, invest, clean up the developing world. Repeat.
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According to an article in this month's Science Journal, researchers at Simon Frasier University in British Columbia have developed a new technology to generate electricity from the natural motion of walking. Assistant professor of kinesiology Max Donelan and other team members say their biomechanical energy harvester promises to revolutionize the way people charge the batteries that power all sorts of mobile devices, like laptops, cell phones, and emergency rescue gear.
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Artificial photosynthesis may be the key to harnessing energy directly from the sun and creating a limitless renewable energy source, experts say.
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Science & environment: Challenges of next 50 years include reprogramming genes to prevent diseases and producing clean energy
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The five-decade quest for cheap solar power has produced an alternative energy that's still about four times more expensive than conventional electricity. But a group of local physicists, engineers and astronomers hope to be the first to break the cost barrier of solar energy.
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Researchers at Simon Frasier University in British Columbia have developed technology that generates electricity from the natural motion of walking. In an article published in the journal Science this month, Max Donelan, an assistant professor of kinesiology, and other team members say their biomechanical energy harvester promises to revolutionize the way people charge the batteries that power all sorts of mobile gear.
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Signs suggest solar power might be reaching a tipping point.
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A startup promises to install solar panels on your roof for free, and sell you the power for pennies. Is it a revolution, or clean-energy vaporware? By Marty Graham.
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Integrazione crescente iniziando da energie e infrastrutture
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By Nash, Steve  Biofuel's the thing, the new universal solvent, the energy elixir, the great wet hope. Your next car-or maybe the one after- could run on corn, or soybeans, or old pizza boxes.
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With oil near $50 a barrel, alternatives to gasoline are attracting more attention - including fuel cells, devices that convert hydrogen into electric current with no waste products except heat and pure water.
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Thanks to global warming, nuclear energy is hot again. Its promise of abundant, carbon emissions-free power is being pushed by the president and newly considered by environmentalists. But any expansion won't come cheap or easy.
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Shining a light on the solar industry.
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With oil reaching a record-high &#36;54 a barrel and natural gas doubling in price in the last two years, renewable energy is looking a lot better &#151; not just on environmental merits but on price.
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Researchers are goading tiny organisms like bacteria and algae into producing fuels like hydrogen and methane. The process is not useful yet, but the technology could be a solution to the energy problem. By Amit Asaravala.
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Years before most knew about green energy, Iceland was tapping into its geysers and volcanoes. With gas at $8 a gallon, renewables now provide almost all heating and electricity. And advocates can see a country free of fossil fuel use by 2050.