State whether each of the following statements is true (T) or false (F).

1. We should wastewater since it is a renewable resource and we do not need to be careful in its use.
2. A resource always has the same economic value.
3. With respect to electricity, water was a potential resource until a few years back.
4. All natural sources of energy are renewable.
5. A farmer is a human resource.
6. Resources need to be conserved for future generations.
7. Sustainable development is a way to use resources carefully as well as saving them for the future.