Here’s a map that crossed my desk this morning all about how affordable rooftop solar is becoming in many places around the US. (This comes from a big infographic out of the Union of Concerned Scientists…)

It doesn’t take a rocket scientist to figure out why Minnesota might be a bit slow with this particular technology. This time of year, the sun can’t shine its way out of a paper bag. I’d bet it also depends on the regional cost of energy.

How might a greater reliance on rooftop solar affect urban development patterns, both here and elsewhere?