Chimney stacks pouring smoke and gases into the air. A US flag in Detroit blows in the smoke. Smoke in the air behind a beautiful yellow flower. Smoke seen behind barbed wire. Aerial view of factories. Smoke and gases from many chimney stacks. The heavily polluted Detroit river. The polluted Rouge River. Factory seen behind piles of cars in a junk yard. A crane drops car parts on a pile of junk. Downtown Detroit sparkling in the sun.