Everything now a days is "green" friendly. Even SFHotlist is green (have you received our fun SFHotlist reusable bag?). Here are some great resources for finding out how you can live green and some green living tips for homeowners.
FYPower.org/Flex your power: Enter a zip code and search for local rebates, energy audits, etc.
Cheers.org/California Home Energy Efficiency Rating Services: Rates and certifies home builders on energy-efficient construction
Green.CAR.org/California Association or Realtors: Has information for homeowners, Realtors and the general public on how to green their living spaces
EasyEcoBlog.com: Blog posts with tips that are doable with minimal effort
NARI.org/National Association of the Remodeling Industry: Facts about green remodeling
EnergyStar.gov: Offers guidelines for energy audits and management, green construction and rebates