There is a very impressive set of reasons why we could and should encourage less CO2 intensive forms of transport, indeed many actions. However, these arguments always seem to me to take the pattern of picking the extreme example of whatever good we are hoping to achieve and then implying that everyone else could easily make the switch. There is always a wide and natural variety in things and this is true for differences between nations too. Extreme examples used like this often just end up making a bigger divide between people because the discussion misses all of the important differences that constrain choices and shape outcomes. We just end up talking from our own perspectives and experiences rather than exploring the complicated and difficult questions of how we can produce localised and regional responses to CO2 emissions drawn from fossil fuels.