content: I do think the article touched on it in a tangential way, along with a number of other "efficiency" ideas.  I did find it kind of ironic that the autho said essentially all of the estimates would likely be wrong... Which is true, since it is mostly guesswork at this point. Fwiw, solar power isn't free of its own environmental footprint (albeit probably smaller than most).. It takes energy and resources to make and maintain those panels along with all of the other components.