What are two important uses of petroleum?
a. to make plastics and as a source of energy
b. to make computer chips and as a source of energy
c. to make plastics and as a material for building houses
d. to make computer chips and as a material for building houses

Imagine you are a business executive who wants to pursue an environment policy for your company that limits pollution and uses fewer raw materials but would cost more what might be the discussion to your next broad meeting how would you make your case to your shareholders