This is pretty hard to gauge of course, but let's say we will use LEED buildings as a metric. If you look at the LEED buildings by state map we recently published, it's clear that California takes the cake in all categories, with thousands more LEED certified buildings than any other state. However, looking at the map, it was notable that the top 4 states were identical to the top 4 states in automobile emissions, as well as urban sprawl, among a number of other factors.
Furthermore, when sorting the data from Certified to Platinum, some interesting trends appear. Most notably, California...