Question

less pollution in covid time write a paragraph
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Answer 1

Answer:

Explanation:

The nationwide lockdown due to the pandemic has led to a drastic decline of NO2 emissions and reduced air pollution levels. It’s important that this is maintained even after the lockdown lifts

Amidst the devastating Covid-19 pandemic, a rare positive has been the significant global decrease in air pollution levels. Primarily, experts have measured nitrogen dioxide (NO2), one of the six major air pollutants (in addition to particulate matter, carbon monoxide, sulfur dioxide, ground-level ozone, and lead). NO2 has, like most other gases, natural and human sources.

Natural sources include lightning, oceans, and volcanoes. However, in urban regions, naturalsources of NO2 account for a small fraction of the total NO2 levels; according to a 2005 report by Australia’s Department of the Environment and Heritage, natural sources of NO2 only account for 1 per cent of overall NO2 levels in cities. Human activity is almost entirely responsible for NO2 emissions in urban regions, with road transport being the number one cause. Planes, power plants and ships, all of which burn fossil fuels, are also significant human sources of NO2. Given this, it’s unsurprising that during the stringent global lockdowns, NO2 levels have dropped significantly in urban areas, especially in India’s densely populated cities.

Answer 2

Explanation:

Worldwide spread of COVID-19 in a quite short time has brought a dramatic decrease in industrial activities, road traffic and tourism. Restricted human interaction with nature during this crisis time has appeared as a blessing for nature and environment. Reports from all over the world are indicating that after the outbreak of COVID-19, environmental conditions including air quality and water quality in rivers are improving and wildlife is blooming. India has always been a hub of pollution with huge population, heavy traffics and polluting industries leading to high air quality index (AQI) values in all major cities. But after declaration of lockdown due to COVID-19, quality of air has started to improve and all other environmental parameters such as water quality in rivers have started giving a positive sign towards restoring. This paper provides evidence-based insight into improvement of air quality and environment during pre and post lockdown of this pandemic situation. An attempt has been made to visualize the improvement in the air quality using tools like satellite images of Indian atmosphere, results of onsite real-time monitoring at specific locations (Ghaziabad-highest polluting city of India) and Air quality index (AQI) calculated by central pollution control board of India.