CLOSE UP Part 1

The Highway and Its Environment

Part 6

Amazonia

Part 4

Investigations Into Aqua-Space

Part 3

Press Conference on Passive Smoking

Part 6

Greenhouse Gases Threaten Public Health and the Environment

Part 7

Untitled

Part 3

Tom Lehrer Sings "Pollution and Don't Leave It All to the Experts"

Part 3

President George H. W. Bush's Press Conference at Rio De Janeiro Heads of State Earth Summit

Part 18