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
Lowest of the Low (book) Lowest of the Low (book) Lowest of the Low or Lowest of the Low: the Turkish worker in West Germany is the English translation of German journalist Günter Wallraff’s book Ganz unten (“At the bottom”), originally published in Germany in 1985. The book describes his undercover experiment as a Turkish migrant worker in West Germany over the span of two years. Wallraff assumes the identity of a Turkish man named Ali Sigirlioğlu. Wallraff opts to disguise himself for his experiment. He alters his appearance by wearing contact lenses and a wig to make himself appear younger, and additionally adopts what