I recently drove on I80 through Iowa on my way to Denver and back. West of Des Moines the highway passes through a couple of wind farms with numerous wind turbines visible on both sides of the highway. They were a bit startling to encounter as they had not been there when I drove the same highway in 2007. I also encountered big trucks on the highway carrying wind turbine blades which are very long. Apparently wind power in Iowa is growing rapidly and Iowa has passed California and is now second to Texas in domestic wind power.