9 Delhi inhales smoke
Delhi boasts the world's largest fleet of CNG buses. Achieving this was not easy. It took decades of right-to-clean air campaign, public interest litigation, Supreme Court orders and overcoming efforts of auto-makers to discredit CNG. ("The CNG sabotage", March 1-15, 2001). Sadly, diesel vehicles still outnumber CNG buses. Today, Delhi's toxic air is making global headlines once again.