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Emissions from Europe’s Cars 38% Worse than Ratings Indicate

Carbon dioxide emissions from Europe's new cars last year were about 38% worse than their official ratings indicate, says the International Council on Clean Transportation.
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Carbon dioxide emissions from Europe's new cars last year were about 38% worse than their official ratings indicate, says the International Council on Clean Transportation.

The group praises the industry for beating its 2015 target of lowering its fleet average CO2 emissions to 130 g/km by two years. But ICCT's 59-page analysis, From Laboratory to Road, warns that the gap between lab results and real-world performance more than halves the official CO2 reduction.

ICCT concedes that measuring actual emissions is difficult because of the wide variation in vehicle types and driving behavior. But it points out that aggregating large sets of on-road fuel consumption data proves the gap is widening. It blames test loopholes and technologies such as stop-start systems that deliver better results in the lab than on the road.

The group says the new Worldwide Harmonized Light Vehicles Test Procedure will produce "somewhat more realistic" values. But it argues that some form of in-service testing will be necessary to show actual industrywide results.

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