Could Subway Trains Generate Power with Regenerative Braking?

September 10, 2010 by  
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Photo: Flickr , CC Could Save Millions of Dollars Per Year Vehicles without regenerative braking are throwing away a lot of energy every time they brake (movement is converted into heat via friction on the brake pads). Hybrid and electric car address that problem by capturing as much of that energy as possible and converting it into electricity, and the same might be about to happen to subway trains with the added twist that it would be tied to the (smart) power grid. The Southeastern Pennsylvania Transportation Authority (SEPT..

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Could Subway Trains Generate Power with Regenerative Braking?

US Objects to Its Airlines Having to Pay For Their Pollution in EU Emission Trading Scheme

September 10, 2010 by  
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photo: Josh Beasley via flickr This one’s been inbound for a couple of years now, the United States objecting to the European Union’s plans to make foreign airlines start paying for the carbon emissionsM from landing and taking off there from 2012, but as the New York Times reports, the US is upping the pres…

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US Objects to Its Airlines Having to Pay For Their Pollution in EU Emission Trading Scheme

Today on Planet 100: Italian Mafia Cleans Up with Wind Energy (Video)

September 10, 2010 by  
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Today on Planet 100: Italian Mafia Cleans Up with Wind Energy (Video)

CREE to Supply 10.5W LED Downlights to Home Depot

August 19, 2010 by  
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Photo: Cree Let There Be Light At TreeHugger, we’ve been writing about ways to make lighting more energy efficient for years. Not because it’s the most important things to do to reduce your footprint (more important things including: signing up for Green Power with your utility company, buying as little stuff as possible and making it last, and using your feet, your bike , or

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CREE to Supply 10.5W LED Downlights to Home Depot

Is Sinking, Emptying Venice An Eco-City Exemplar?

January 9, 2010 by  
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The view across the water from St. Mark’s Square. Photo by Jennifer Hattam.

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Is Sinking, Emptying Venice An Eco-City Exemplar?

CES 2010 – Recellular Boosting Positive Impression of Buying Used Phones

January 9, 2010 by  
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With all these brand spankin’ new cell phones set up at the booths of CES, with the bright lights of the tradeshow floor glinting off their scratch-free surfaces, it’s easy to ignore the idea of buying used. That’s why we’re happy Recellular is back at this year’s CES, showing off some only slightly older cell phones, in practically brand new condition, that have been diverted from landfills and recycling plants.

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CES 2010 – Recellular Boosting Positive Impression of Buying Used Phones

CES 2010 – Sungen Making Portable Solar Power Easy

January 9, 2010 by  
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Sungen International Limited is a company putting solar power in all sorts of places that make it easy to access solar wherever you are. Pictured above is one of their foldable gadget chargers, which charges to full in about 18-25 hours of sunlight. But it’s just a tiny taste of what the company has available

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CES 2010 – Sungen Making Portable Solar Power Easy

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