ACROSS

1. When people move into natural forests because of expanding population, it is called ______.
2. the ability to keep things in balance by replanting the same number of trees (or even more) than we harvest
3. a unit used to measure lumber
4. a resource that can be replanted or replaced
5. A __________ area is government land set aside for natural forests and recreational use.

DOWN

1. the community of the plants and animals and their environment space
2. a place for animals and plants to live
3. wood for commercial use
4. forests (natural or planted) where trees can be cut for commercial use
5. an area of timberland where the trees are planted and harvested by people
6. the kind of plants that one would expect to see growing on timberlands

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