Nathan heard a programme on Radio 4 the other day which involved the presenter wandering through central London, wearing one of those special back packs which monitors pollution. The levels were, as you'd expect, worryingly high, to the extent that the advice has become to stick to back alleys and side streets as much as possible to avoid drinking in too many exhaust fumes. Interestingly, by far the highest spike in the readings came when the presenter took a taxi back to base at the end of his walk. The air conditioning in a vehicle effectively pumps the exhaust fumes from the car in front straight into the respiratory systems of the driver and passengers. This effect is worsened in slow moving traffic, which, of course, sums London up, particularly now that most borough operate 20 mph speed limits.
I wonder if I'm slowly dying from lead poisoning?