• Akansha Singh
• Rachna Chaturvedi
• Garima Awasthi
• Jyoti Prakash

The year late 2019 has introduced rigorous conditions all around the world beginning from Wuhan, city of China. A novel as well as dreadful pneumonia flamed out in December 2019, pathogens were isolated and recognized and were originally named as Coronavirus or COVID-19 alike SARS (Severe Acute Respiratory Syndrome) and MERS (Middle East Respiratory Syndrome) coronavirus. The fast transmission of virus from one infected person to others created panic all over the world and therefore World Health Organization officially declared this virus as Global Pandemic on February 11, 2020. To prevent the spread of these pandemic stay-at-home instructions took start all over the nation which also led to improvement in the quality of air all over the world. As most of the air pollution occurs due to industries and motor vehicles in the urban areas. Whereas pollutants such as PM10, PM2.5, NO2, CO, SO2 increases in the atmosphere leading to certain respiratory disorders. Therefore, EPA (Environmental Protection Agency) has introduced a tool known as Air Quality Index (AQI) resembling the quality of air to the mankind. The outcome of analysis done by the researchers shows that number of metropolitan cities such as New Delhi, Bengaluru, Ahmedabad, Mumbai as well as Moscow, Paris, Beijing, Tehran have moderate to poor AQI but post lockdown the cities witnessed major decrease in AQI. Almost all the countries across the world witnessed major decrease in AQI due to lockdown. This paper covers studies about few Indian cities and few cities across globe that experienced major decrease in Air Quality Index Post Lockdown. Therefore, the positive impact has been shown post lockdown resulting in the cleaner air as well as good impact on human health.

The year late 2019 has introduced rigorous conditions all around the world beginning from Wuhan, city of China. A novel as well as dreadful pneumonia flamed out in December 2019, pathogens were isolated and recognized and were originally named as Coronavirus or COVID-19 alike SARS (Severe Acute Respiratory Syndrome) and MERS (Middle East Respiratory Syndrome) coronavirus. The fast transmission of virus from one infected person to others created panic all over the world and therefore World Health Organization officially declared this virus as Global Pandemic on February 11, 2020. To prevent the spread of these pandemic stay-at-home instructions took start all over the nation which also led to improvement in the quality of air all over the world. As most of the air pollution occurs due to industries and motor vehicles in the urban areas. Whereas pollutants such as PM10, PM2.5, NO2, CO, SO2 increases in the atmosphere leading to certain respiratory disorders. Therefore, EPA (Environmental Protection Agency) has introduced a tool known as Air Quality Index (AQI) resembling the quality of air to the mankind. The outcome of analysis done by the researchers shows that number of metropolitan cities such as New Delhi, Bengaluru, Ahmedabad, Mumbai as well as Moscow, Paris, Beijing, Tehran have moderate to poor AQI but post lockdown the cities witnessed major decrease in AQI. Almost all the countries across the world witnessed major decrease in AQI due to lockdown. This paper covers studies about few Indian cities and few cities across globe that experienced major decrease in Air Quality Index Post Lockdown. Therefore, the positive impact has been shown post lockdown resulting in the cleaner air as well as good impact on human health.

"Impact of lockdown during COVID-19 on Air pollution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 1, page no.502-514, January-2021, Available :http://www.jetir.org/papers/JETIR2101067.pdf

"Impact of lockdown during COVID-19 on Air pollution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 1, page no. pp502-514, January-2021, Available at : http://www.jetir.org/papers/JETIR2101067.pdf