In addition, the popularity of 'chip tuning' diesel engines to improve their power also risks wiping out the benefits of lower emissions from diesel fuel, and seems to boost PM emissions by a factor of three. Furthermore, says the report, even without factoring in non-tested equipment like air conditioning, CO2 emissions from transport have gone up about 20% over the past decade, as growth outstrips clean technology innovations. An agreement from car manufacturers to cut CO2 to 140g/km by 2008, though likely to be met, will not be enough to have a significant impact on emissions. The EEA.
