If your surrounded by NO trees,is it harder for you to breathe?

Question

i mean like in a desert somewhere or in alaska or something.shoulndt the air be thin

Answer 1

No.  The oxygen gets distributed more or less evenly around the world.

Answer 2

Most of the other answers are correct -- oxygen is spread all over the world.  It moves at about the speed of a gentle breeze -- say about 5 miles per hour, and there has been millions and millions of years for it to spread out.

A few million people in one place would not make any difference, since they use only a tiny fraction of the oxygen in the air.  Fresh oxygen would move into the place as fast as people and animals could use it.

A really big forest fire might lower the oxygen level a few percent, for a few hours.

Answer 3

No,

The oxygen diffuses through the air very quickly, plus winds mix it all the time. The air moves less inside a room than it does outside (unless you have a fan) and you're fine. The percentage of oxygen in air is very low anyways, and your breathing rate, and heart rate will compensate for any variance in oxygen.

People always say that having a plant in a room will make you healthier because of the oxyen it makes, but plants have much lower metabolisms than we do, and a small plant will never actually make enough oxygen to make a difference for a person. Air moves in and out of rooms all the time anyways, or else you'd suffocate.

Answer 4

no because ALL plants give off oxygen.

Answer 5

The percentage of oxygen in the air doesn't vary that much from place to place, I think.  Your lungs will extract the amount you need, and there's usually plenty.  You're more likely to have problems from lower pressure at high altitudes.