A Quarter of Cars on Road Produce Most of the Pollution

That beat-up junker in your neighbor’s driveway is likely to produce more pollution during a long day’s commute than some newer vehicles emit driving cross country.

A new study out of Canada has tried to quantify the pollution gap. By monitoring traffic in downtown Toronto, scientists found that 25 percent of the cars they measured produced 95 percent of the total particulates and 93 percent of the carbon monoxide.

The University of Toronto research team led by Professor Greg Evans (ChemE) made on-the-spot measurements of the exhaust from 100,000 vehicles driving past air sampling probes set up on one of Toronto’s busiest roads. Read full CNBC story.