Some useful links to related sites and articles:
Special Guardian Report
The oxygen crisis - could the decline of oxygen in the atmosphere undermine our health and threaten human survival?
(Read the Guardian Report)
Technology Innovation: A new Inhaler Cap for OXYfit pure oxygen cans improve breathing.
Designers at NewPharm SA, the manufacturer of OXYfit pure oxygen in a can, have found a way to make breathing from the can much easier.
(Click here to read more)