Los Angeles remains the smoggiest city in the U.S., while air pollution affects nearly half of the population, exacerbated by climate change and policy changes.
Read moreSevere fog and hazardous air quality in Delhi lead to significant travel disruptions, with over 150 flights impacted and trains delayed.
Read moreThick smog in New Delhi raises alarms over flight disruptions as visibility drops to zero. Air quality remains 'very poor' amid ongoing pollution issues.
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