Biosphere 2: Building A New World
Media playback is unsupported on your device

Building a new world inside a giant greenhouse

In September 1991, an ambitious ecological and environmental experiment was launched in Arizona.

Eight scientists aimed to prove that human beings could produce everything they needed to survive in an artificial environment - Biosphere 2.

Linda Leigh was one of the eight who spent two years sealed inside a giant greenhouse.

Witness: The stories of our times told by the people who were there.

Go to next video: The wedding that broke centuries of tradition