As an alternative, the documents of LEED or another green building rating/standards system might be convenient. Use one of the checklists in the discussion with the owner. Be sure that everyone signs off on what was agreed. Here is a look at this option http://www.njasla.org/sustainable.htm.
Maybe "environmentally responsible design" is not a service that your firm offers? Should you include a note in your contract with your client, the architect, that reflects this?NB, this isn’t a legal opinion, just a reflection of the discussion in class.