Missouri Biosphere

During a summer camping trip, a teenage boy and his sister discover the hidden truth of the Biosphere and their father's disappearance.

The United States, once the land of the free, has become a land of biospheres.  Huge tracts of land, from which 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.