Destroy Shredmaster Packle in Quickchop's Lumber Farm.
Shredmaster Packle is responsible for much of the devastation down there, <class>.
Rumor has it he modified the shredders to work more quickly with less regard for the collateral damage they can inflict.
Imagine the agony the trees must endure being hacked at. It will be difficult to recover from this level of destruction.
The first step in any recovery is acknowledging the problem. Step two is eliminating that problem.