The stratosphere (/ËstrÃ¦tÉËsfÉªÉr, -toÊ-/) is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. About 20% of the atmosphere's mass is contained in the stratosphere.
The chainsaw is a highly effective and efficient tree and branch cutting power tool. It works with an engine, referred to as a power head; powering a metal chain, driven by a centrifugal clutch, with a chain moving around a groove in the guide bar at fast speeds.
A rickshaw, or Jinrikisha, is a light, two-wheeled cart consisting of a doorless, chairlike body, mounted on springs with a collapsible hood and two shafts. Finished in black lacquer-ware over timber, it was drawn by a single rickshaw runner.ver time, cycle rickshaws (also known as pedicabs), auto rickshaws, and electric rickshaws and were invented. Pulled rickshaws created a popular form of transportation, and a source of employment for male laborers, within Asian cities in the 19th century.