Webinar :Register now for webinar on 'Trade BankNifty in just 15 minutes a day' - By Asmita Patel
you are here: HomeNewscoronavirus

Coronavirus pandemic-induced lockdowns reduced NO2 levels by nearly 20%, says NASA

NASA researchers have found that nitrogen dioxide, or NO2, (produced by combustion of fossil fuels) levels in the air have gone down by nearly 20 percent since February 2020 due to imposition of lockdowns to curb the spread of the novel coronavirus
Nov 19, 2020 / 05:39 PM IST
Representative Image
Representative Image

For months almost the entire world was observing a lockdown to contain the spread of the deadly novel coronavirus. By April, most countries were under a complete shutdown to stop the contagion and ramp up healthcare facilities to deal with the global health crisis.

A study conducted by the US space agency the National Aeronautics and Space Administration (NASA) has revealed that these measures helped reduce pollution significantly.

NASA researchers have found that nitrogen dioxide, or NO2, (produced by combustion of fossil fuels) levels in the air have gone down by nearly 20 percent since February 2020.

The NASA report was based on data collected from 46 countries. Hourly atmospheric composition measurements from over 5,000 observation sites were studied by NASA experts. They found that 50 of the 61 cities they studied saw 20-50 percent reduction in nitrogen dioxide levels.

“We all knew lockdowns were going to have an impact on air quality…. In some ways I was surprised by how much it dropped… Many countries have already done a very good job in lowering their nitrogen dioxide concentrations over the last decades due to clean air regulations, but what our results clearly show is that there is still a significant human behaviour-driven contribution,” said Christoph Keller, who is the lead author of the study and is with Universities Space Research Association (USRA) at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

COVID-19 Vaccine

Frequently Asked Questions

View more
How does a vaccine work?

A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.

How many types of vaccines are there?

There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.

What does it take to develop a vaccine of this kind?

Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.

View more
Show

As per NASA findings, China’s Wuhan, which was the epicentre of the coronavirus pandemic outbreak and was the first to impose a lockdown, showed the first reduction in emission level – it was as much as 60 percent lesser than expected. The other region that showed similar reduction in nitrogen dioxide emissions was Milan.

Meanwhile, in New York, which was for long the worst-affected city in the US, pollution levels declined by 45 percent.
Moneycontrol News

stay updated

Get Daily News on your Browser
Sections