According to the trade association’s Wind Powers America 2019 Annual Report, Iowa is now generating more than 10,000 megawatts of wind energy, accounting for more than 40% of the state’s electricity.

Wind became the leading source of electricity in both Iowa and Kansas this year, making them the first states to reach that benchmark. Previously, coal-fired power generation had been Iowa’s main source of electricity.

Projects in Iowa added the second-most wind power capacity of any state in 2019, behind only Texas.

Read more: Wind blows by coal to become Iowa’s largest source of electricity