The Eco Music Festival will debut this year at Colorado’s Snowmass Village from June 30 to July 3. As we’ve previously announced, EMU (the acronym used by the fest) pledges to be carbon neutral and hold appeal for both eco-enthusiasts and music fans. On the music side, the Disco Biscuits have just been added to a lineup that already features Leftover Salmon, Tea Leaf Green, RJD2, Perpetual Groove, New Mastersounds and Michael Thomas Smith. The festival also will host the Eco Climb-It Challenge, a 3,000 vertical-foot competitive mountain climb, among other activities.Tickets are now on sale, with details at the Eco Music Festival site.