Fiat is lowest polluter. - According to a report by Transport & Environnement, Fiat is the manufacturer of the least polluting cars in Europe in terms of CO2 emissions. The Italian giant, thus, just edges out PSA Peugeot-Citroen (138 grammes per kilometre, against 139) which was last year's European lowest CO2 emission per kilometre champion. Renault retains third place, with 143 g/km, followed by Toyota of Japan. German manufacturers tend to be penalised by the weight of their cars, which...