Troposphere

According to Mr. Woolner, the troposphere is the most important part of the atmosphere. This part of the atmosphere includes skydiving, airplanes, kites, birds and everything on the surface of the Earth. The troposphere can be from 7-11 miles above the Earth. The Troposphere has a connection to weather because all weather type things happen, in the troposphere. Here is the composition of the troposphere. 80% of it is nitrogen, while oxygen makes up about 20% of it. I guess that oxygen doesn't take up a full 20%, because Argon, Water vaper and Carbon Dioxide all take up less than 1% of the troposphere. It is important that we keep our troposphere healthy because we can't survive anywhere else.