01 Jun '11, 8pm

San Francisco Replacing 18,500 Street Lights with LEDs

San Francisco Water, Power and Sewer is beginning a city-wide project late this year to replace 18,500 high-pressure sodium street light fixtures with LED fixtures. The new fixtures will use 50 percent less energy than the existing street lights and will cost far less to maintain since they only have to be replaced every 15 - 20 years compared to the current bulbs that have to be replaced every four years.

Full article: http://www.ecogeek.org/efficiency/3519-san-francisco-repl...

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gas2.org 02 Jun '11, 3am

Productivity: Current claims of algae producing 15,000 gallons of biofuel per acre per year are, according to Dr. John Ben...

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orionmagazine.org 02 Jun '11, 8pm

With future generations in mind, my family will never leave the land we steward poorer, nor its water scarcer than conditi...