@@LordGizmo the boom is not normally that oval, if you look you can see the lines on the side of the crane duplicated, and the clouds at the rear of it duplicated aswell.
Don't worry! It's likely that the 'forest' that was being cut down was man-made to start with, grown in order to be later harvested for its lumber. It may look harmful, but do not worry, most of the time these aren't used for merely clearing land space. When they are, it's also generally for relatively small patches of land, generally for agriculture. Hopefully though, one day, we'll never need to cut down any preexisting forests anymore. It's sad to see the loss that occurs with it.