This is Cool Tunes for a Hot Planet’s EARTH DAY episode, offering three very different strains of eco-music. Solartopia, by David Bernz, Harvey Wasserman, and Pete Seeger– the renowned elder statesman of folksong and righteous causes – envisions a day when our energy needs will all be met by the sun. I Wanna Be Cool, by Will Kimbrough and Brant Miller, is a rousing international collaboration about all the ways we ferventlywish for a cooler planet. And Que Corra el Rio is Karla Lara’s beautiful, moving tribute to the defense of the Gualcarque River, in Honduras, when it was threatened by a hydroelectric project nobody in the region wanted. Happy Earth Day!