Original: While the area of natural stands with large old trees is rapidly decreasing, substantial areas of regrowth exist and it is increasingly grown in plantations, the long, straight, fast growing trunks being much more commercially valuable than the old growth timber.
Simplified: While the area of natural stands with large old trees is rapidly decreasing, large areas of new trees exist. It is increasingly grown in plantations where the long, straight, fast growing trunks are more valuable than the old growth timber.