Karl was someone I admired, and worked with to make our mutual home town a better greener place. He was a wonderful listener, and his commitment inspired all who worked with him.

I was devastated to hear about Karl's passing. I was Mayor of Palo Alto when he worked for the City of Palo Alto. He turned into a real plan the dreams we had for Palo Alto to become a leader in climate protection, both Palo Alto city operations and the entire city. We couldn't have done it without him -thank you Karl Knapp. You will be sorely missed.