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Compared to the Air Quality Index in March and April, 2019, the same time period in 2020 saw a decline of 51 percent in the southern city of Bengaluru in India. The nationwide lockdown to contain the coronavirus (COVID-19) had suspended industrial production across sectors and curbed vehicular movement throughout the country. This brought down pollution levels significantly across Indian cities. Levels of nitrogen dioxide were also reported to have fallen according to satellite imagery.
The country went into lockdown on March 25, 2020, the largest in the world, restricting 1.3 billion people and got extended until May 17, 2020.