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I'm chillin’ in the stratosphere,
The stratosphere is the second layer of the Earth's atmosphere.
It is situated just above the troposphere, and just below the mesosphere.
The stratosphere is between 10–13 km (30,000–40,000 ft; 6–8 mi) and 50 km (160,000 ft; 31 mi) above the Earth. It occurs at lower altitudes at the poles.
In the stratosphere, temperatures get warmer as altitude increases (in the troposphere temperatures get lower as altitude increases).
The important ozone layer (helps block dangerous UV rays from the sun) is found in the stratosphere.
Commercial aircraft typically cruise in the stratosphere where the cool temperatures and low air density enable better fuel economy. Also, the stratosphere has less air turbulence than the mesosphere, so it can offer a smoother ride.
Although it is not common, some birds can fly in the lower levels of the stratosphere.
*At 29, 029 feet, some say the summit of Mt. Everest is the only land on Earth that protrudes into the stratosphere. "http://www.nature.com/news/2008/081028/full/news.2008.1191.html" Nature News