Articles with the keyword: 
Damming doesn't hurt salmon? Something is fishy, scientists say.
Darkfrog submitted, created time 3 weeks 4 days (www.nature.com)
Damming rivers is an environmental conundrum. On the one hand, hydroelectric power provides clean, relatively reliable energy. On the other, damming rivers can endanger fish populations ...or can it? A recent study performed on the dammed Columbia River and undammed Fraser River suggests that perhaps the smolts are all right.
Salmon travel the rivers at two points in their lives: first, they must find their way downriver to the ocean as smolts (juveniles) and second, they must find their way back upstream to the spawning grounds in the last stage of their lives 
Alternative energy: Nuclear power makes a comeback
Darkfrog submitted, created time 4 weeks 1 day (www.nytimes.com)
Unlike countries such as France, which maintained a strong tradition of nuclear power throughout the latter twentieth century, the United States has not had an uncancelled commission for a nuclear power plant since 1973. The Arab oil embargo of that decade, as well as the Three Mile Island and Chernobyl disasters, changed the economic and political climate in such a way that made nuclear plants less economically and politically viable.
Still there are over one hundred nuclear power plants in the greater U.S. that have remained in operation all these years
Wind Turbines Don't Make Birds Fly the Coop
sea-maid submitted, created time 1 month 2 weeks (sciencenow.sciencemag.org)
A study finds that, despite concerns, offshore wind farms are largely not harmful to seashore or migrating birds. The presence of wind farms affected only one in twenty-three species. Although researchers warn not to extrapolate these results to inland birds, there seems to be little fear. The article mentions, in passing, that the wind farms are, however, dangerous to bats.
Carbon-free energy? Already in progress, says Nature.
Darkfrog submitted, created time 3 months 1 week (www.nature.com)
Here, Nature magazine gives an overview of the several different means of generating electricity without releasing carbon dioxide into the atmosphere. Increasing the efficiency of existing fossil fuel systems is also given its due.
Once again, we see why Nature is at the very top of science writing. Take a look at this:
"The fact that hydroelectric systems require no fuel means that they also require no fuel-extracting infrastructure and no fuel transport
U.S. retailers chase a solar panel deadline
Darkfrog submitted, created time 3 months 1 week (www.nytimes.com)
U.S. retailers might consider floor space to be the number one claim on their attention, but they're finally putting those big, flat roofs to work toward the bottom line. No, they're not doing cheery rooftop displays of their merchandise; they're installing solar panels. If they do so before December 31 of this year, they will receive a generous tax write-off.
So far, the big chains like Wal-Mart, Kohls, Whole Foods, and Safeway have outfitted about one in ten stores with rooftop solar panels, but we can expect more if Congress renews their offer for 2009 and beyond
Nature examines thin-film and other solar cells
Darkfrog submitted, created time 3 months 3 weeks (www.nature.com)
There are a few different varieties of solar cell on the market and in development, but they've all got their ups and down. Traditional solar cells are now an established technology, but they are very expensive to make and their efficiencies don't top 22%. Other, newer types of solar cells (with one exception) are even less efficient, but they are much less troublesome to mass-produce. Some types of solar cells can even be woven into cloth.
As always, I'm a fan of Natures whole-picture approach. The practical, hopeful and economic aspects of this project all get their treatment.
Enzyme structure reveals key ingredients for making hydrogen
sea-maid submitted, created time 3 months 3 weeks (www.nature.com)
Iron and carbon monoxide are the crucial ingredients that nature uses to process hydrogen, according to researchers. Resolving the structure of the last of the three known hydrogenase enzymes has excited chemists, who are keen to follow nature’s clear advice and develop their own hydrogen catalysts for energy applications.
Organic dye lets window panes harvest the Sun
sea-maid submitted, created time 4 months 1 week (technology.newscientist.com)
Harvesting sunlight before turning it into electricity could become easier thanks to an exotic organic dye developed in the US.
Solar power: Organic dyes help harvest sunlight
Darkfrog submitted, created time 4 months 1 week (www.nature.com)
Researchers claim that glass laced with specific dyes can channel photons into small solar cells, giving them as much power as if they covered a larger area without overheating. Researchers tried dye-enhanced solar devices years ago, but the research was full of problems. Either the dyes would break down in sunlight or the photons would be reabsorbed too quickly.
Marc Baldo of MIT claims that once the process is fine-tuned the efficiency of most of today's solar cells could be doubled. The research team believes that their work could be available commercially in as little as three years.
"Flammable ice" could be mined for fuel
sea-maid submitted, created time 6 months 2 weeks (environment.newscientist.com)
Many signs point toward an energy crisis at some point in the future, so this may come as a pleasant surprise: "'Flammable ice' could be mined for fuel." A team of geologists from Canada and Japan has extracted methane much more efficiently, and without hot water, by pumping air out of drill holes in the frozen structures. This reduces the pressure, raising the melting point of the ice so that the methane could be removed.
Change in ethanol policy might be needed
kavin submitted, created time 6 months 2 weeks (hosted.ap.org)
The federal government might need to rethink its support for corn ethanol because of rising food prices. In the U.S., prices are rising sharply. In other countries, they're seeing riots because of the lack of food.
Molten salts give biofuels a boost
kavin submitted, created time 6 months 3 weeks (www.sciencenews.org)
As we know, it is favourable that breaking down cellulose could improve prospects for energy-efficient biofuels. But it is diffecult to degrade cellulose. In this study, the researchers find that molten salts can help break down the tough, energy-containing cellulose molecules without creating unwanted by-products.
a revolution in solar power--thin-film
sea-maid submitted, created time 6 months 3 weeks (www.sciam.com)
Thin-film photovoltaic cells, like those in the array seen here in Mainbernheim, Germany, can harvest as much energy from the sun with far less semiconductor material,the lowest cost and most reliable thin-film technology directly into building construction materials will be the beginning of a revolution in solar power, we will see the day when solar became an economically substantive part of our energy mix
Biofuel blends not as green as they seem
wugongliang submitted, created time 7 months 3 weeks (environment.newscientist.com)
Despite their green intentions, buyers of blended biofuel may not be getting quite what they are paying for.
Giving Solar Power Lights to More People
Sue Wu submitted, created time 8 months 6 days (www.nature.com)
Life may be about to get a bit brighter for some of the 1.6 billion people across the world with no access to electricity.
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