21-Day Lockdown in India Dramatically Reduced Air Pollution Indices in Lucknow and New Delhi, India.

摘要: In December 2019, the outbreak of viral disease labeled as Novel Coronavirus started in Wuhan, China, which later came to be known Covid-19. The has spread almost every part world and been declared a global pandemic March 2020 by World Health Organization (WHO). corona virus emerged one deadliest pandemics all time human history. ongoing COVID-19 forced several countries observe complete lockdown forcing people live their homes. India also faced phase total for 21 days (in first phase) avoid coronavirus maximum possible extent. This impacted pollution levels environment improved air water quality short span owing very less activities. present work scientifically analyzed available data primary pollutants (PM2.5, NO2, SO2 CO) from two major Indian cities, Lucknow New Delhi. analysis was based on before after (first 21 days) periods each. results showed significant decline studied indices demonstrated improvement both cities. impact seen PM2.5, NO2 CO. during period. are presented with future perspectives mitigate near adopting periodical tool.