scheduled to close in 2016 scheduled to close in 2016 dropped by 44 percent between 2007 to 2015 scheduled to close in 2016 scheduled to close in 2016 scheduled to close in 2016 scheduled to close in 2016 aging coal plants scheduled to close in 2016 scheduled to close in 2016 scheduled to close in 2016 out all over the country scheduled scheduled to close in 2016 retired scheduled to close in 2016 scheduled to close in 2016 median age scheduled to close in 2016