Managers said the special rooms will have small amounts of nitrogen piped into them to reduce the oxygen content in the air, so fires cannot start.

BBC: 'Fire-free' rooms at Birmingham library protect archive

Science fiction writers tell us about astronauts put into suspended animation on long trips to the stars, their metabolism slowed to a crawl to reduce food and oxygen requirements.

FORBES: How to Cheat Death

Corus said the investment would reduce C02 emissions by reusing gas generated inside the Basic Oxygen Steel (BOS) plant.

BBC: RELATED BBC SITES

It has found ways to reduce the amount of platinum and other exotic metals needed to combine hydrogen and oxygen.

ECONOMIST: Cars