Scientists aren't the only professionals concerned about the health of the planet these days. Opera star Joyce DiDonato, on her new album Eden, proposes that Mother Nature has a lot to teach us, if we'd only pay attention.

The music of Eden asks more questions than it answers — beginning with the opening track, The Unanswered Question, a mystical orchestral piece from 1908 by the American iconoclast Charles Ives. DiDonato, placing her own stamp on the performance, steps in to sing the undulating solos originally written for the trumpet.