India reduced sulphur contents in diesel drastically to 50 parts per million (ppm) when it introduced its new emission norms in 13 cities last year. The rest of the country, however, still uses 350 ppm diesel.
"New engines may have eliminated visible black smoke that we see from old diesel vehicles, but the tiny and toxic particles are still high as these cars are not equipped with the advanced particulate traps that are now mandatory in the U.S. and Europe...
Continued at: CNN
