What's The Air Like Up There?

The amount of people living and working at higher altitude has increased thanks to the advances we?ve made in technology with new rail, road and air systems we?ve been easily able to commute to higher climates but how is this going to affect us especially our health?
Its been estimated that in the west of the U.S alone up to 30 million people either travel or live at heights over 5000 feet. But can we function as well up there as we can at sea levels. We all know that the body requires oxygen to function, normal air contains about 2o% oxygen but as we increase in altitude the levels of oxygen lowers in proportion and we find that our lungs have to work harder to take in the same amount. The problems from lack of oxygen or altitude sickness can range from blackout View the rest of this article