Study brings call to curb landfill sites etc

1.	Two alternatives to using landfill to dispose of waste are recycling
	and incineration.
	a) Which metals are commonly recycled?
	b) What are the advantages and disadvantages of incineration?

2.	Give some examples of industrial solvents and of pesticides.
	Include names and chemical structures.

3.	Most plastics are non-biodegradable.
	a) What does biodegradable mean?
	b) Give a common use for the following plastics:
	Polystyrene		Polythene 		Poly vinyl chloride