We are all aware that the advertised economy figures for new cars are nearly impossible to match or surpass under normal driving conditions. It is something you factor in when looking for your next purchase, especially if you want it to be a particularly efficient one.
Now, according to a study published by the International Council on Clean Transportation (ICCT ), the discrepancy between the declared and real-world numbers has risen to around 25 percent, up considerably from 10 percent a decade ago.
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