Emmy Award-winning acoustic ecologist has written the next Silent Spring-and forever changed our conception of conservation and activism.

Gordon Hempton is an acoustic ecologist and Emmy Award-winning sound recordist. For nearly 25 years he has provided professional audio services to musicians, galleries, museums, and media producers, including Microsoft, Smithsonian, National Geographic, Discovery, National Public Radio, and numerous other businesses and organizations. He has received recognition from the Charles A. Lindbergh Fund, National Endowment for the Arts, and the Rolex Awards for Enterprise. He studied botany and plant pathology at the University of Wisconsin. His sound portraits, which record quickly vanishing natural soundscapes, have been featured in People Magazine, a national PBS television documentary, "Vanishing Dawn Chorus," which earned him an Emmy Award for ?Outstanding Individual Achievement.? Hempton has now circled the globe three times in pursuit of environmental sound portraits. His new audio series--Environmental Sound Portraits--is the first new work to appear in more than a decade. He lives in Port Angeles, WA.

John Grossmann has been a freelance writer of magazine articles and books for nearly all of his working career. He has written on as wide a range of topics as implied by the following list of magazines that have published his work: Air & Space/Smithsonian, Audubon, Cigar Aficionado, Esquire, Geo, Gourmet, Health, Inc., National Geographic Traveler, The New York Times Magazine, Outside, Parade, Saveur, Smithsonian, Sports Illustrated, and USA Weekend. He ghostwrote the 2006 book Smart Moves for Liberal Arts Grads (Ten Speed Press); and before that wrote the 100-year history of one of the nation's oldest and most successful summer camps, YMCA Camp Belknap, which he attended as a camper and leader and where his two sons have also been campers and leaders.