An urgent, resounding call to protect 50 percent of the earth''s land by 2050thereby saving millions of its speciesand a candid assessment of the health of our planet and our role in conserving it, from the award-winning author of The Experience of Place and veteran New Yorker staff writer. "An upbeat and engaging account of the remarkable progress being made to preserve vast wild spaces for animals to roam."The Wall Street Journal Beginning in the vast North American Boreal Forest that stretches through Canada, and roving across the continent, from the Northern Sierra to Alabama''s Paint Rock Forest, from the Appalachian Trail to a ranch in Mexico, Tony Hiss sets out on a journey to take stock of the "superorganism" that is the earth: its land, its elements, its plants and animals, its greatest threats--and what we can do to keep it, and ourselves, alive. Hiss not only invites us to understand the scope and gravity of the problems we face, but also makes the case for why protec