I actually heard that live, it was on Nick's Ferrari monthly interview with Ken Livingstone on LBC. Problem with Ken Livingstone is that he just won't listen and when he reads something he can only see what he wants to see. This is persistant throughout his entire career as a Mayor - majority of people in west london vote against Congestion Charge extension as it will kill small businesses but Ken will go ahead with it anyway because he believes people in Kensigton & Chelsea are misinformed. The Adjudication Panel for England suspends him for a month for bringing his office into disrepute but he won't accept it as he believes his position is higher than that of a panel and will spend £100k of council tax money on appeals. It just goes on forever.
Now, back to Clarkson issue:
Clarkson said he's more interested in colour of a gear stick than co2 figures when choosing a car because for every scientist claiming co2 is responsible for global warming you'll find at least one who reckons it's caused by something else.
And he's right, because let's face it - in many countries scientists are not bothered by co2 figures at all - for Japanese for example co2 is considered easy to deal with, nitrogen oxides on the other hand are something that they are really affraid of - Jap hatchbacks might have fuel appetites of a lorry but you'll find all kinds of recirculation valves, EGRs and other variations to cut down NOx emissions. In UK however we don't even test those emissions during MOT at all. I would say, out of all options, I would go with Japs on that one.