A person cannot climb without oxygen. If you don't have any oxygen whever you're climbing, you'd be dead in 15 seconds.
You can climb in thin oxygen, not none.
The mountain is not said to be a techncal climb, it is the high altitude and lack of oxygen that makes it hard to climb.
There is not much oxygen
Up to the end of 2014 there has been 193 ascents to the summit of Mount Everest without oxygen. Not very many when you consider that there has been around 5,000 people who have reached the summit of the highest mountain in the world.
Because of high altitude sickness which is affected by climbing up high were there is high altitude. High altitude is were there is to much oxygen up high, if you breech in to much oxygen you could faint.
1. Experienced limbers no longer use oxygen tanks as a matter of course. 2. It is possible to manage without oxygen, even on top of Everest, if you aren't doing anything but standing around. It is very hard to exert yourself, however, without an adequate supply of oxygen. 3. The higher you get, the "thinner" the air and the less oxygen. Taking in oxygen is the basic purpose of breathing in the first place. 4, There are now devices and techniques which can help climbers breathe without the need for "bottled" oxygen. For example, anyone planning to climb Everest these days is likely to spend several weeks at altitude beforehand, to give their body time to adapt (like producing extra red blood cells which can then absorb oxygen).
3 feet People have climbed Everest.
Most people bring oxygen tanks with them because of the high altitude and the thinness of the air (the oxygen at the top of Mount Everest is about 1/3 that it is at sea level). But a very few people have made it to the top without them.
A mountain goat can climb to however high it wants to climb. That's like asking you, how high can you climb?
the less oxygen
How high can panda bears climb
When you climb a mountain it gets harder to breath because the higher you get the less amount of oxygen there is and the more pressure. Your lungs are not used to that so it gets harder to breath.
It is harder to breathe on the summit of Mount Everest than at sea level due to the lack of oxygen. The higher you climb upwards the less oxygen there is, you enter the death zone where the thin air is.