Wood<span> is a </span>renewable<span> resource; trees can be replanted and grown to maturity in place of those that are cut down. As long as the trees are replanted at the same rate as they are cut down </span>wood<span> will be a </span>renewable<span> resource. Rainforests are said to be</span>non-renewable<span> because they take thousands of years to re-grow
</span>When fibers absorb water<span>, it first is held in the cell walls themselves. When the cell walls are full, any additional </span>water absorbed<span> by the </span>wood will<span> now go to fill up the cavities of these tubular cells. Fiber saturation is the level of moisture content where the cell walls are holding as much </span>water<span> as they </span><span>can</span>
