Non-renewable energy

For this Discussion Board assignment choose one non-renewable mineral resource and answer the following:
1.    Report where the mineral is found in economically accessible quantities,
2.    Report what the current economically accessible reserves are and how long they are expected to last (depletion time),
3.    Explain what the mineral is used for and describe at least one example,
4.    Discuss one method of how this mineral resource could be used more sustainably and support your discussion with at least one example.