C. G. Haberman retired in Nebraska after teaching twenty years with twenty years of professional environmental work sandwiched in between. His science-teaching experience covered secondary, communi...voir plusC. G. Haberman retired in Nebraska after teaching twenty years with twenty years of professional environmental work sandwiched in between. His science-teaching experience covered secondary, community college, and four-year liberal arts institutions. His environmental work spanned three States over twenty years and involved enforcement work.voir moins