Emissions Recalibrated...
In 1993 exhaust emission limits, (generally referred to as the Euro I standards) were introduced for new cars which resulted in the adoption of advanced emission control techniques, e.g. catalysts. More stringent emission limits came into effect in 1997 (Euro II) and 2001 (Euro III). However, a further tightening of the emissions limits, referred to as Euro IV, began on the 1st January 2005 and will be fully in force by 1st January 2007.
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