Iowa’s fleet of wind farms accounted for 35.8% of in-state power generation on a 12-month rolling average through August, “by far more than any other state”, Branstad said Thursday at an event hosted by the American Wind Energy Association.

The share of wind in Iowa’s power mix is growing rapidly: Wind accounted for 31.3% of in-state generation in 2015, AWEA figures show.

And with several huge wind developments underway in the state – including MidAmerican Energy’s 2GW Wind XI project and Alliant Energy’s 500MW Whispering Willows expansion – Iowa is “well on track” to blow past the 40% mark by the end of the decade, Brandstad says.