India now grades air quality along a colour-coded chart based on pollutant levels.
- The new National Air Quality Index measures – PM2.5, PM10, nitrogen dioxide, ozone and carbon monoxide.
- Officials warned that the quality of new monitoring stations was mixed across the country – This augurs bad for such a comprehensive move.
- 12 Indian cities were among the WHO list of the world’s worst 20 for air quality.
- Also, India does not yet have a mechanism in place to bring down peak pollution levels.