Global oxygen level falling, warn scientists

LONDON: The world has realized the danger of rising carbon dioxide (CO2) emissions. It has, in its own way, been fighting global warming. But what about the long-term fall in oxygen levels and its knock-on effects?

Compared to prehistoric times, the level of oxygen in the earth's atmosphere has fallen by over a third and in polluted cities the decline could be more than 50 percent.

This change in the makeup of the air we breathe has potentially serious implications for our health. Indeed, it could ultimately threaten the survival of human life on earth, says Roddy Newman, who is drafting a new book, The Oxygen Crisis.