Atmosphere of Earth However, polar stratospheric or nacreous clouds are occasionally seen in the lower part of this layer of the atmosphere where the air is coldest. The stratosphere is the highest layer that can be accessed by jet-powered aircraft. The troposphere is the lowest layer of Earth's atmosphere. It extends from Earth's surface to an average height of about , although this altitude varies from about at the geographic poles to at the Equator, with some variation due to weather. The troposphere is bounded above by the tropopause, a boundary marked in most places by a temperature inversion (i.e. a layer of
What Where the metallic floor accentuate the chilly atmosphere. O'Donnell said in interview: "[T]here is no set in the original play, but I argued that the whole play is about power and the abuse of power, and how information is power, so we used the library as a metaphor for somebody who has control of all the power and all the information. When it came to casting, I was looking for a particular type of actor – somebody who could bring a sort of menacing quality to the screen. There is a lot of menace in the play. "What Where" is about