Observes ecologists with the Norbeck Society of this thinning project on the Black Hills National Forest%3A %22This photo shows a %27corridor%27 where the regeneration has been driven over to retrieve the mature trees. With th removal of the larger trees%2C the remaining smaller trees will grow a little faster%2C but will soon stagnate into the kind of area that attracts mountain pine beetle infestation. It is already a fire hazard.%22