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.
Chainsaws For Sale. Welcome to our chainsaw store. We offer new and used chainsaws for sale from all the major manufacturers. In our opinion you can't go wrong with either a Husqvarna or Stihl chainsaw but makes such as Echo, McCulloch and Homelite are also worth considering.