The Indian capital New Delhi — which frequently tops the world’s most polluted city lists — saw a 60% reduction in PM2.5 levels from March 23 to April 13 from the same period in 2019.
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The Indian capital New Delhi — which frequently tops the world’s most polluted city lists — saw a 60% reduction in PM2.5 levels from March 23 to April 13 from the same period in 2019.
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