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Green tech finds (6/30/11)

A car designed by teenagers that gets nearly 2000 mpg, white roofs for New York City, and how your DVR is jacking up your electric bill… this week’s green tech finds.

  • Puma’s “clever little bag” is biodegradeable: We mentioned Puma’s alternative to the shoe box back in April of 2010; PSFK reports that the bags will also be compostable (or, if you’re impatient, they’ll dissolve in water in a few minutes). (via Environmental Leader)

  • The 2000 mpg car? OK, not quite… this design by students at Kingdown School in Warminster, UK got a mere 1,980 mpg. That was more than enough for it to win the Mileage Marathon Challenge at Mallory Park track near Leicester. (via Inhabitat)

  • Growing algae for biofuels… on the cheap: Algasol Renewables has has created a new photobioreactor for growing algae that could cut costs by 90%. The basic concept: a plastic bag full of algae that floats on the ocean.

  • Printable solar cells: Tata steel is now incorporating printable dye-sensitized solar cells by Dyesol right onto girders it produces (take a look at one above). The cells aren’t particularly efficient, but they are really cheap. (via Grist)

  • Your DVR is an energy hog: According to a new report by NRDC, DVRs and cable boxes waste about $2 billion in electricity in the United States every year. With no standard sleep mode, these devices run at full power even when they’re not in use. (via Care2)

  • White Roof Project cooling off the Big Apple: The White Roof Project is a volunteer effort in New York City that hopes to cut the city’s energy use, and urban heat island effect, by painting black roofs with white solar reflective paint. (via Shareable)

  • Solar powered netbook coming to the US: Samsung will release its NC215S solar-powered netbook in the US, Russia, and Africa on July 3rd…. and it’s not outrageously expensive: $399. (via Earth Techling)

  • Build a solar USB charger from an Altoids tin: Greenwala stumbled across this great (and cheap)  little project on Instructables: a DIY solar charger (for your phone, etc.) made from an Altoids tin (plus a few other things).

Got another find for us? Let us know about it in the comments…

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Image credit: Dyesol