These are the sorts of questions that you can ask to queery what comes into the process. Is it possible to change the specification of the materials used? Could they be:

• More durable
  

• Less toxic
  

• More re-usable or recoverable

Ask questions like:

Will selection of resources aid energy or utility efficiencies?

Will reducing the size or dimensions of materials reduce wastage?

Does the choice of raw material or product impact on issues of resource sustainability?