France has introduced this year a fairly simple system of bonus/malus for new cars linked to their CO2 emissions (if below 120g/km, you get a few hundred euros bonus, if above 200g/km you pay a couple thousand euro penalty).

The change in the kinds of vehicles sold this year has, so far, been remarkable, with a massive boom for smaller cars (especially those with the best engines, emissions-wise), large drops for bigger cars and more polluting engines, and a massive effort by manufacturers to provide models that fall jsut below the threshholds.

When half-year statistics come out next month, I'll try to do a post.

In the long run, we're all dead. John Maynard Keynes