What does the stratsophere contain

The stratosphere contains 9.9% of air mass over the Earth. 90% of the ozone layer is found in the stratosphere's upper crust. For more information, look it up. Oh and by the way, airplanes fly in this layer. Hope this helps. Good luck on anything your doing. Please mark brainliest if you feel like it, I would really appreciate it.

the movement of aircraft through clouds can even cause lightning strikes. a single lightning event is a "flash", which is a complex, multi-stage explosively ejected.

explanation:

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