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50 simple tips from a year of living the green life
Photovoltaics on the roof. Geothermal heating under-ground. Spiffy dual-flush toilets all about.
By Karen Klages
January 13, 2008

Photovoltaics on the roof. Geothermal heating under-ground. Spiffy dual-flush toilets all about.
By Karen Klages
January 13, 2008