Particles in diesel exhaust are toxic and can harm the foetus. Given the high levels of particulate pollution in Delhi, CNG is the cleanest option available
"Notices have been sent to parents that April 1, 2001 onwards they would need to arrange for their children getting dropped and picked up from school,' reported Delhi newspapers in January 2001. The
Despite making a mess of converting its diesel buses to CNG, the Delhi Transport Corporation (DTC) is more complacent than ever. It has shed all responsibility of augmenting the bus fleet to 10,000.
The Swedish experts have identified traces of over 40 substances in diesel exhaust that are listed by the epa as hazardous air pollutants and by the California Air Resources Board as toxic air contaminants.