最も見られました から U.S. Department of the Interior

The transcript discusses the prevalent drug culture, particularly marijuana use, among youth in national parks. It highlights the perception that...

Focuses on an open-pit mining operation. Shows huge haulage trucks, pointing out existing and potential hazards involved in their operation....

This short produced by the U.S. Department of Agriculture showcases the state parks of Minnesota, and shows how they provide recreation and...

Explains the first aid treatment for burns and scalds to relieve pain, to prevent or treat shock, and to prevent infection. Discusses the different...