Pilot the first municipal carbon trading scheme for residents.

Create citywide, scaleable carbon market where residents (and businesses, tourists) are assigned a personal/household ghg cap based on current avg ghg consumption. These cool points would need to be spent initially on ghg main offenders like gas, home heat, electricity. Over the cap? You'll have to buy cool points from wee emitters on our local carbon market. Buy, sell and save your cool points with a cool points visa-like card/number. The annual cap would gradually be reduced, and the price of carbon would increase.

Perhaps politically and logistically unfeasible, at least at a municipal scale, but would certainly create set of carrots and sticks for energy misers and gluttons.