A community planner learns that a community uses lumber from a nearby forest to build houses and provide fuel for wood-burning stoves. She determines that every year more trees are chopped down than planted. What conclusion can she draw about the sustainability of this community's land-management practices?
The practices are sustainable because the community plans to use coal in the future.
The practices are not sustainable because eventually the community will run out of trees.
The practices are sustainable because the community does not produce much pollution.
The practices are not sustainable because the community uses the same resource for fuel and shelter.