Tensions have been building for some time about high polluting cars, the effect that this has on urban environments and the governmental stakeholders who are responsible for those urban environments, but this is the first real open conflict I have come across. Porsche Great Britain is protesting the Mayor of London from raising the congestion charge for the highest polluting cars (only 2 out of 56 Porsches for sale are not in this category). (Via Green Car Congress)