Asbestos

1		What is asbestos?
2		Which varieties of asbestos are linked to cancer and which varieties are not linked?
3		Discuss the merits of removing all asbestos from public buildings when only one variety has been linked to cancer.

The Next Crisis

4		Discuss some examples of mineral resources that can be recycled and some that cannot be recycled
5		Discuss phosphate fertilizers, why they are important, and why they cannot be recycled.
6		Explain why it possible or not possible to recycle phosphate fertilizers.