Activity - Prepare a report.* "The air quality has improved during lockdown." How has this improvement led to nature's come back? What precautions should be taken in future to maintain this quality?
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Answer:
Amid the COVID-19 pandemic, a nationwide lockdown is imposed in India initially for three weeks from 24th March to 14th April 2020 and extended up to 3rd May 2020. Due to the forced restrictions, pollution level in cities across the country drastically slowed down just within few days which magnetize discussions regarding lockdown to be the effectual alternative measures to be implemented for controlling air pollution. The present article eventually worked on this direction to look upon the air quality scenario amidst the lockdown period scientifically with special reference to the megacity Delhi. With the aid of air quality data of seven pollutant parameters (PM10, PM2.5, SO2, NO2, CO, O3 and NH3) for 34 monitoring stations spread over the megacity we have employed National Air Quality Index (NAQI) to show the spatial pattern of air quality in pre and during-lockdown phases. The results demonstrated that during lockdown air quality is significantly improved. Among the selected pollutants, concentrations of PM10 and PM2.5 have witnessed maximum reduction (>50%) in compare to the pre-lockdown phase. In compare to the last year (i.e. 2019) during the said time period the reduction of PM10 and PM2.5 is as high as about 60% and 39% respectively. Among other pollutants, NO2 (−52.68%) and CO (−30.35%) level have also reduced during-lockdown phase. About 40% to 50% improvement in air quality is identified just after four days of commencing lockdown. About 54%, 49%, 43%, 37% and 31% reduction in NAQI have been observed in Central, Eastern, Southern, Western and Northern parts of the megacity. Overall, the study is thought to be a useful supplement to the regulatory bodies since it showed the pollution source control can attenuate the air quality. Temporary such source control in a suitable time interval may heal the environment.
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As the world pandamic (corona virus) has took place there was a sudden improvement seen in nature. Many of the species that were asked to be extinct we seen back in many countries due to no human presence due to lock down .As all countries had lockdown of different durations this led to decrease in air pollution .In india delhi is considered as the most pollouted country but during lockdown its air air polution also decreased by 25percent.Ozone hole that was increasing at a high rate also started recovering.And all nature started recovering.If we want to keep our mother earth earth to be in better cindition then we should follow the regular table of lockdown so that our mother earth can recover itself and save it for upcoming generations....