engaging Brent in the creation of better, greener places to live and work
Oh, actually, many of the UK's local authorities compare carbon emissions to how much it takes to fit inside Wembley Stadium. We have the stadium, so maybe we could use it (even post-ironically?).
This site may be of interest, too:
Would it help if everyone could see their carbon emmissions in the work place? Making energy visible has been proven to make people change their habits.