Chlorophyll. It's green because of chlorophyll.

[ The answer was plain and dry, but he nodded a halfhearted thanks for the next drink. ]

Would I be a broken record to say I'm not sure about that either? [ He frowned, appearing thoughtful. ] Some would tell me I should make things better before they get worse but others might tell me the opposite. How do you make a choice based on hypothetical advice when it's conflicting?