Coronavirus lockdowns have led to an unprecedented fall in air pollution for these major cities.
However, there has been a silver lining too. The Earth has begun breathing again after the factories closed down. The air quality has improved in many cities. Swiss-based air quality technology company, IQAir, which measured the pollutants before and after the pandemic. It showed that there has been a 60% fall of PM2.5 when compared to 2019. Seoul has a 54% drop in its PM levels and Wuhan registered a drop of 44%. The findings were published this Wednesday.