although i strive to be as green as i can there are some jobs which just need a bit of power. logging is one of them. My new chainsaw, is 20% lower on fuel. and has much lower emmisions than most , it did a job that would have taken all day with a hand saw in around ten mins the new range of Stihl chainsaws with the CB-E letters are Also much easier to start.Many of the logs were very well seasones oak and Elm. not a job for the bow saw unless you have a long weekend spare.