Karachi, Pakistan, exposes 16 million residents to toxic air from industrial emissions, burning waste dumps, and an ageing vehicle fleet with minimal emission controls. The city records an average PM2.5 of 80 µg/m³, which is 2.5 times the safe limit set by the World Health Organization. This makes it worse than Bamako's 75 µg/m³, yet still 37% less severe than #5 Hotan's particulate levels.
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