Well, Van does have a valid point...

The amount of old growth left is rather low and in areas like west of the Cascade mountains on the West coast, trees do grow back quickly. A lot of the land that people like Weyerhauser have available to them is quick growing lands where they can clear cut whole hill sides, come in and replant, and wait 10 years or so and go back in again and harvest more trees (and they have plenty of hillsides like this). Rinse and repeat as much as necessary (although you may have problems with erosion due to the clear cutting).

Let nature take her course in the forests, she knows far better how to manage them than we do.