Cool. I wish we were in one of the blue or purple areas!
Aside from continually improving efficiency/conserving resources, it looks to me like photovoltaic, passive solar and solar-thermal technologies are among the best clean energies for this area.
With help from CFH Design Studio, we are designing a new (smaller, greener, more efficient etc.) house that may include a built-in solar oven. Have to do some more research to see if it makes sense for the site/orientation. Also hoping to budget solar thermal water heating, and perhaps even radiant floor heating powered by the solar thermal hot water.
Anybody here already done a built-in solar oven? Got any tips to share?