Scientist Envisions Small-Scale Hydropower
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A scientist says the United States could more than double its hydropower supply by harnessing the energy of smaller streams. Doug Hall said the feat can be achieved using small turbines or generators instead of dams.
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They could be powerful new weapons in the battle against global warming: turbines powered by waves or wind, or technology that scrubs the skies to recapture and recycle carbon.
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Some families are trying to save money and the planet, with energy from backyard turbines.
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The country's infrastructure makes it an attractive candidate for offshore work, a research company says.
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A team of US scientists show off a novel device that harvests energy from human movements.
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NANOTECHNOLOGY -- engineering substances down to billionths of a meter in size -- holds out such promise of providing super-strong materials or desalinating water inexpensively that no one wants to put a red light in its way. But there are enough safety questions to justify more yellow lights than either industry or government has yet deployed.
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Tiny metallic rods have been turned into miniature "propellers" by a Canadian research team.
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Scientists have struggled for years to make electricity from the sunâs light, at a cost competitive with other power sources. Now they are close, using the sunâs heat instead.
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By Anonymous  Size and shape may predict the survival of coral reefs around the world when the weather churns the oceans in the years to come, according to a new model that relies on engineering principles.
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Nearly 150 years ago it was no more than  a concept by a visionary scientist, but researchers have now  created a minuscule motor that could lead to the creation of  microscopic nanomachines.
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Ghana is to begin building a new hydroelectric dam amid concerns of its likely social and environmental impact.
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Electricity available day and night is due to come online for a small island community for the first time.
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BELGRADE, Dec 3 (IPS) - The parliament of the tiny republic of Montenegro  began a long awaited debate this week on building a hydropower  plant on the Tara river, one of the most attractive tourist and  nature reserves in former Yugoslavia.
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BEIJING - The first turbine generator on the right bank of China's massive Three Gorges Dam, the world's biggest hydropower project, has started operations, state media reported Monday.
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When farmer Greg Bryant first heard about plans for windmills along a swath of mountain ridges in this northeastern Vermont hamlet, he was all for it. The idea of tapping a plentiful natural resource for power was appealing.
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By Claire Soares  The world's first floating wind turbine could be up and running in under two years after the German engineering giant Siemens teamed up with a Norwegian energy group yesterday to try to generate electricity in the middle of the North Sea.
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Nanowires put more power in smaller packages, researcher reports.