Replanting with saplings does not replace trees older than the United States of America.

Few timber companies have ever cared about water quality, the safety of their workers or downwinders sickened by their helicopter spraying of poisons.

The timber industry and Forest Service knew for decades they were going to run out of big trees, but it was much more fun for them to blame the decline on one of the many species being wiped out by deforestation than to admit they cut far too quickly.

Three thousand years ago, the liquidation of the cedar forests around the Mediterranean created new deserts.  We haven't learned much since then.