On June 21, 2019, the U.S. Environmental Protection Agency finalized the Affordable Clean Energy (ACE) rule which requires states to develop plans to address greenhouse gas emissions from existing coal-fired power plants. The ACE rule replaces the 2015 Clean Power Plan, which was repealed in the same rule-making. The ACE rule becomes effective on September 6, 2019, and Iowa DNR will have three years to submit a state plan. The rule, fact sheets, and other materials are available on EPA's website. Please contact Marnie.Stein@dnr.iowa.gov if you would like more information.