Speaking of ecological footprints, Personal Kyoto letsSep 29 2006

Speaking of ecological footprints, Personal Kyoto lets your track your energy usage and reduce it according to the Kyoto Protocol. It only works for NYC residents...just grab your ConEd bill, punch in your account number, and PK will display your energy usage for the last year, along with averages and your Kyoto goal.

Update: PK's creator tells me that he's looking to bring the project to cities other than NYC. Good stuff.