EPA is taking direct final action to approve State Implementation Plans (SIPs) submitted by the States of South Dakota and Wyoming that address interstate transport with respect to the 1997 8- hour ozone and fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standards. EPA has determined that the Interstate Transport declarations submitted by South Dakota on May 15, 2007, and by Wyoming on May 3, 2007, satisfy the requirements of the Clean Air Act section 110(a)(2)(D)(i) provisions, also known as the "good neighbor" provisions, that a state SIP contain adequate provisions prohibiting air pollutant emissions from sources or activities in the state from adversely affecting another state. This action is being taken under section 110 of the Clean Air Act.