Missouri Biosphere

The United States, once the land of the free, has become a land of biospheres. Huge tracts of land, from which the citizens were removed and crowded into teaming cities, were now part of the "Green Movement". It was a plan to save the world from pollution, or so they were told. During a summer camping trip, a teenage boy and his sister discover the hidden truth of the Biosphere. Why were they finding secret military camps? Who were these people? What were they doing here? And what did these...