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Air pollution over north India plummets to 20-year-low due to lockdown: NASA

Air pollution over northern India has plummeted to a 20-year-low for this time of the year, according to satellite data published by US space agency National Aeronautics and Space Administration (NASA). The US space agency’s satellite sensors observed aerosol levels at a 20-year low post the countrywide lockdown, implemented to slow the spread of the...