Hmm. So we have a choice: Run the risk of breathing in carcinogens, or simply die of starvation because we can't get the food to the people. Politicians will always obfuscate this sort of stuff to suit whatever agenda they can make money out of. Same thing with CO2 emissions. The politicians ramp them down in their tests and the makers of emissions equipment rake in a fortune. But, engines have to be optimised to pass the EC tests, which actually makes them less efficient and emit more CO2 in real life situations, as we have found at www.honestjohn.co.uk/realmpg