Why do you think there is more oxygen in the troposphere?

I think there is more oxygen in the troposphere because the closer you get to earth, the more oxygen there is. The troposphere is very close to the earth, therefore, there is lots of oxygen in the troposphere.

its like this, "if i give a plant an unlimited amount of sunlight,then the plant will grow to its largest possible size."

hope it let me know if it does or doesn't =^-^=

life would be meaningless without memes