According to research from GLA Economics Londoners are leading the UK in environmental friendliness. It's partly that the roads are too expensive to drive, so we're forced onto public transport where we set new records for the number of people packed into a compartment. But it's also because we're relatively wealthy, which means we can spend a bit more on technology that comes with a conscience. If you want to read the full report, go here and download the pdf. But, be warned, it's a hefty document (replete with fancy Mayoral colour images of buses by night and shiny people by day).