Back to wood chopping

The snow has melted and the plus Celsius had replaced the freezing point. Even the sun was shining all day today which is very nice. So I went outside to saw some more wood. After a few hours of work there is still lots left to do and it made think of the chanin saw ... the chain saw would cut this in max an hour but how sustainable is a chain saw? Oil, petrol, parts, noise, fosil smoke, protection equipment and is far more dangerous than the hand saw. Not to mention the exercise I got for free ;)