Wood is also in great demand as firewood in deverloping countries. In many areas, people depend and wood to cook their food. As the population grows, the need for wood grows, too. But when too many trees are cut at once, forest are destroyed. A future source of wood is destroyed as well. When some trees in a forest are left standing, the forest can grow back. But only if it is not cut again for at least 100 years. In reality,