Moving up the foodchain:
If you are concerned that your turning off lights, recycling paper, etc., doesn't make a significant difference, your audience may feel that way about their own actions -- at least I think we all agreed to this concern in our discussion Wednesday.
How can you help your audience move "up the foodchain" of influence? What if you gave visitors to the exhibition signs to post outside elevators reminding OTHER people to take the stairs and use less energy? How else could you empower them to influence others?