Could Deforistation lead to lack of ability to light fires?

[Khartoum]

yes, there are better methods for preventing forest fires then elimination oxygen in the atmosphere

 

[wasteofo2]

uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

I never said anything about forest fires damnit!

 

[Pawel]

One thing that has not been mentioned with the altitude argument, is that if you think about breathing engines of aircraft that require oxygen to burn fly at very high altitude. so my understanding is that oxygen does not need to be plentiful at all for a decent combustion, i do also take the assumption that aircraft move very fast so they'll cover more particle space.

People who live in higher altitude are healthier as the body goes through more stress so they generate into much hardier systems. Also taking in effect the geography is more rugged and requires effort, so they don't get time to catch the bus and chill out smoking a cigarette while the wind blows it out every 20seconds.

can someone translate 25,000ft in metres quickly.. i couldn't bother searching it on the net.. however if you talk in metres from 4000m->6000m it's no problem. Even everest being almost 9000m you can still sustain yourself without problems. They carry oxygen tanks as it is easier for someone who hasn't adapted/climatized in that region already putting in a big effort climbing such a mountain.

 

[chroot]

Sorry, Pawel, but I have to take offense to just about everything you've said here.

Originally posted by Pawel
One thing that has not been mentioned with the altitude argument, is that if you think about breathing engines of aircraft that require oxygen to burn fly at very high altitude. so my understanding is that oxygen does not need to be plentiful at all for a decent combustion, i do also take the assumption that aircraft move very fast so they'll cover more particle space.

Aircraft that fly at high altitudes uses turbines to compress the intake air. See "turboprop" and "turbojet" engines.

People who live in higher altitude are healthier as the body goes through more stress so they generate into much hardier systems. Also taking in effect the geography is more rugged and requires effort, so they don't get time to catch the bus and chill out smoking a cigarette while the wind blows it out every 20seconds.

People who live at altitude are healthier? Do you have any research to support this claim, or is it just speculation?

can someone translate 25,000ft in metres quickly.. i couldn't bother searching it on the net..

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

however if you talk in metres from 4000m->6000m it's no problem. Even everest being almost 9000m you can still sustain yourself without problems.

9000 m is 27,000 feet. Almost everyone on Earth will die at those kinds of pressure altitudes. Most people need oxygen to survive above 15,000 feet or so.

- Warren

 

[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]

Originally posted by chroot
Sorry, Pawel, but I have to take offense to just about everything you've said here.

Aircraft that fly at high altitudes uses turbines to compress the intake air. See "turboprop" and "turbojet" engines.

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.

People who live at altitude are healthier? Do you have any research to support this claim, or is it just speculation?.

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."

9000 m is 27,000 feet. Almost everyone on Earth will die at those kinds of pressure altitudes. Most people need oxygen to survive above 15,000 feet or so.

- Warren

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.