“At Wolf Trap, operas are staged in 18th-century barns and picnickers enjoy summer concerts from a sloping lawn. A national park and performing arts center outside Washington, Wolf Trap will further connect nature and the arts with an environmental initiative that includes using energy- efficient vehicles, planting more trees and attempting to create a paperless office. … Wolf Trap hopes its environmental project becomes a ‘model and resource for arts presenters across the country’….”