Achieved Emission Reductions
As a result of the massive improvements in new vehicle emissions, driven not only by the increasingly tough emissions regulations, but by customer demand and by the genuine desire of Auto manufacturers to be part of the solution, not the problem, the pollution emitted by road vehicles has dramatically reduced.
Here are a few examples:
This graph using data from the European Auto-Oil II programme shows the predicted reduction of all pollutants from a base of 1995.
In the USA, road-side emission checks on vehicles as they pass, show that emissions have reduced drastically and those from newer vehicles are becoming almost negligible.