Atmosphere of Earth relatively warm air above a colder one), and in others by a zone which is isothermal with height. Although variations do occur, the temperature usually declines with increasing altitude in the troposphere because the troposphere is mostly heated through energy transfer from the surface. Thus, the lowest part of the troposphere (i.e. Earth's surface) is typically the warmest section of the troposphere. This promotes vertical mixing (hence, the origin of its name in the Greek word τρόπος, "tropos", meaning "turn"). The troposphere contains roughly 80% of the mass of Earth's atmosphere. The troposphere is denser than all its overlying atmospheric
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