6, September, 2011
The basic requirement of the atmosphere is to provide oxygen at a partial pressure sufficient for metabolic needs. When the partial pressure of oxygen is as low as 13.75 kPa, almost everyone will experience altitude sickness like: shortness of breath, headaches, insomnia, impaired ability to concentrate or perform complex tasks, and at times nausea and vomiting. It is essential to control the levels of oxygen and carbon dioxide as an excess of either of them can produce unfavourable results. The physiological effects of high levels of carbon dioxide are increased respiration rate and blood flow to the brain; hearing losses; mental depression; headaches; dizziness; nausea and ultimately death. Let's be responsible by not polluting our air unnecessarily with toxic substances that affect the air cycle.