Tim Bowen from onestopenglish created a Guardian Weekly lesson on How to Get Cars out of Cities.

With one of my groups, we never got past the warmer question that asked us to put a list of six cities into a ranking order of ‘greenness’. The discussion triggered by this task was about why these cities had made the list, who had come up with the ranking and, most importantly, what were the criteria for being considered a green city.