National Geographic : 2001 Jul
CLASH ON THE GREEN LINE Cloaking themselves in bucolic names like Valley Springs or patriotic ones like Anthem, subdivisions advance on open space, which pre servationists still rally to defend. In Northern Virginia, development not only devours farmland (right), it threatens historic battlefields too-mobilizing Civil War reenactors (above) to raise money to help preserve the past. Near Tucson, Arizona, cars and power lines often injure or kill birds like the Harris's hawk, but wildlife rehabilitators nurse survivors back to health (top right). At a nursery outside Phoenix, saguaro cactuses tagged for transplantation (top) await final relocation out of sprawl's way-at least for now.