Mumbai second-most polluted in weekly world ranking, Whereas Delhi not among worst 10.
MUMBAI: With temperature rising over the past two days, Mumbaikars may be breathing better, but as per Swiss air tracking index IQAir (a real-time international air quality monitor), within a week between January 29 and February 8, Mumbai was the second most polluted city in the world. On January 29, Mumbai was ranked 10th in IQAir rankings for the poorest spots. It climbed to the top on February 2 before sliding down in subsequent days and then climbing back again to second position on February 8. On February 13, it was the third most unhealthy city worldwide for air quality, overtaking even Delhi which was India's most polluted metro till recently. IQAir partners with UNEP and Greenpeace and uses Central Pollution Control Board data (CPCB) in India to assess air quality. Categorisation into 'healthy', unhealthy' and 'hazardous' is as per US air quality index (AQI) standards, which are more stringent than in India. The world ...