Could Deforistation lead to lack of ability to light fires?

Adam

Remember those old tin can space ships, the Apollo missions and all? They had VERY oxygen-rich air mixtures, but in very low pressure. But their oxygen intake was about normal, because at lower pressure the oxygen moledules are further apart. So at richer oxygen mixes and lower pressure, you get the same saturation of oxygen as at lesser mixes at higher pressure. The result being that the oxygen was hitting their lung tissue at roughly the same concentration as they were accustomed to.

I'll try to be more clear. The important thing is the saturation of oxygen. In lower pressure, you need more of it per volume or air. In higher pressure, you need less of it per volume of air.

Pawel

Don't be too offended by me taking away some oxygen from some of your idle views. I'm talking about standard jet engines, yes they do compress air by the rotary mechanics, however at the burn rate the oxygen levels are minimal in that altitude. So nonetheless it's impressive to note that air breathing engine that need oxygen do so well at such altitudes.

common understanding, p.e. knowledge & witness to seeing people in higher altitudes show they are more robust. Tibetans have a good record of lifespan & health in comparison. Like I mentioned before they need to do more work due to geography, air etc. continually excersizing & a cleaner exchange of air. Athletes from higher altitudes also portray much better performance while in lower altitudes as they thrive in richer oxygen as their bodies are adjusted to lower levels 'thin air'.

Go to www.google.com and type in "25000 feet in meters."

many people have climbed mount everest free of respiratory equipment which reaches close to the altitude u have indicated being almost impossible for a person.