Jan 18, 2018 | Updated: 09:54 AM EDT
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India tests 'anti-smog gun' in Delhi to combat air pollution

As Delhi's air quality worsens with smog returning to the Indian capital this week, authorities in the city conducted a trial run of an "anti-smog gun" to combat its annual pollution crisis. Delhi is the world's most polluted capital, where pollution levels has reached 30 times the WHO's recommended limit.

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