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1. Appropedia.org

   solar hot water & passive solar design - those are still the most cost-effective first steps in sustainable energy use, right?

   Thursday, 27-Aug-09 05:55:03 UTC from laconicabar
   • Dave Riddell

     @appropedia I'd say so, yes.

     Thursday, 27-Aug-09 12:05:09 UTC
   • Harold Jarche Dave Riddell

     RT @pathways Soaking up carbon with artificial trees & algae-based photobioreactors http://bit.ly/kCWLg

     Thursday, 27-Aug-09 15:01:18 UTC