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No country met WHO air quality standards in 2021
13 Sept 12:15 Key points summarised by AI
- A global survey found that no country met the World Health Organization's (WHO) updated air quality standard for PM2.5 in 2021, with only 3.4% of 6,475 cities complying.
- Pollution levels rebounded in some regions after a COVID-related dip, and 93 cities recorded PM2.5 levels ten times higher than the WHO's recommended limit.
- India's overall pollution worsened, with New Delhi remaining the world's most polluted capital, while Bangladesh and Chad were identified as the most polluted countries.
- China, despite historical high levels, showed progress in reducing PM2.5 levels, dropping to 22nd in country rankings, though some cities still faced severe pollution.
