A BRIEF ON COVID-19:
The coronavirus disease- COVID-19 is a highly transmittable and pathogenic viral infection caused by severe acute respiratory syndrome coronavirus 2 or SARS-CoV-2, which emerged in Wuhan, China and spread around the world. Analysis revealed that SARS-CoV-2 is phylogenetically related to severe acute respiratory syndrome-like bat viruses, therefore bats could be the possible primary reservoir. The intermediate source of origin and transfer to humans is not known, however, the rapid human to human transfer has been confirmed widely. There is no clinically approved antiviral drug or vaccine available to be used against COVID-19. However, few broad-spectrum antiviral drugs have been evaluated against COVID-19 in clinical trials, resulted in clinical recovery.
The first human infections were reported at the end of December 2019 in Wuhan, Hubei province in China when a cluster of 41 pneumonia cases was identified. Deeper analysis showed that it was a novel coronavirus. A third – 66% of the cases – had direct exposure to the Huanan Seafood market. Fish, shellfish, wildlife, snakes, birds and several different types of meat and carcasses were sold at this market. The market was closed immediately, and it has not reopened since. (source: ScienceDirect.com, https://www.sciencedirect.com/science/article/pii/S0140673620301835?via%3Dihub)
The strongest speculation of the origin has been that the virus is somehow linked to the market given two thirds of the first batch of people infected had had ties with it. But even this hasn’t been proved yet. Nevertheless, Bats, in particular, have been studied closely because they are considered to be the natural host of coronaviruses.
EFFECT of covid-19 on the environment:
The objective of this article is to analyse the positive and the negative environmental impact of this abhorrent pandemic, Covid-19.
- Improved Air Quality:
The coronavirus has temporarily slashed air pollution levels around the world (source: European Space Agency). Readings from ESA’s Sentinel-5P satellite also show that over the past six weeks, the levels of nitrogen dioxide (NO2) over cities and industrial clusters in Asia and Europe were markedly lower than in the same period last year. Nitrogen dioxide is produced from car engines, power plants and other industrial processes and is thought to exacerbate respiratory illnesses such as asthma. While not a greenhouse gas itself, the pollutant originates from the same activities and industrial sectors that are responsible for a large share of the world’s carbon emissions and that drive global heating. Take transport, for example, which makes up 23% of global carbon emissions. Driving and aviation are key contributors to emissions from transport, contributing 72% and 11% of the transport sector’s greenhouse gas emissions respectively. (Source: http://www.ipcc.ch)
If we consider the case of Delhi, on 6th April, for the third week Delhi continued to breathe clean. The weekend before this saw the best air quality in the national capital region (NCR) in 2020, with an average AQI of 46. The weekend before that, it was at 159. There was a remarked improvement in air quality in the NCR, as the harmful PM10 and PM2.5 levels were down by 35-40% in Delhi (source: The Economic Times).
The visible positive impacts whether through improved air quality or reduced greenhouse gas emissions – are but temporary. This is because they come on the back of an economic slowdown and human distress. During the pandemic, these emissions will stay lowered. But what will happen when the safety measures are eventually lifted? The people will be back to regular.
- Some Cut Downs on Wastage:
- Rethinking how we use energy:
A benefit of no travel and a lockdown is we will spend some time rethinking how we use energy.
- Increase In Use Of Single-Use Plastics:
With as many as 12,82,931 cases recorded in 211 countries ( as of 8 April 2020, 05:30 GMT, Source: WHO), the United Nations’ World Health Organization has recently declared the fast-spreading COVID-19 outbreak as a pandemic. It is natural then that citizens around the globe are hastening to take every possible measure to safeguard their health against the virus. The most widespread of these precautions is the extensive use of surgical face masks.
These masks are mainly made of non-woven fabric such as polypropylene, polystyrene, polycarbonate, polyethylene or polyester. While they keep out bacteria effectively, the masks are plastic-based, liquid-resistant products that have a long afterlife after they are discarded, ending up in landfill or oceans.
Given that surgical masks are supposed to be worn for no longer than one day, their disposal- along with that of empty hand sanitizer bottles and soiled tissue papers- is leading to a massive trail of clinical waste in the environment.
Take the case of Wuhan, for example. The Chinese city which has been at the epicentre of the pandemic and which is home to over 11 million people, is reported to have generated 200 tons of clinical trash on a single day (24 February 2020), four times the amount the city’s only dedicated facility can incinerate per day. (source: scmp.com)
- Mountain Of Waste:
With consumers stuck at home, there’s been a surge in the amount of household garbage as people increasingly shop online and order meals to be delivered, which come with a lot of packaging. (source: time.com)
Meanwhile, China is drowning under medical waste produced by hospitals including face masks and single-use tissues. If the waste is not handled properly, the garbage collectors are likely to catch and spread the infection
- More Hand Wash, More Use Of Water:
Today, the only defence against the pandemic is that we wash our hands frequently — 20 seconds each time. The fact is, clean water remains the most important preventive health measure in the world.
A proper hand wash involves lathering soap and scrubbing hands on both sides for at least 20 seconds, according to WHO guidelines. A 30 to 40 second hand wash would use up around four litres of water if the tap is on, or two litres with the tap closed, while scrubbing with soap. Around 20 to 40 litres of water is used up every day, with the assumption that every person cleans her hands at least 10 times a day, instead of a usual average of five times a day.
A family of five members would thus need 100 to 200 litres of water per day only to wash hands. This would result in the generation of around 200 litres of wastewater per day, a 20 to 25 per cent increase in water demand and generation of wastewater from human settlements. (source: downtoearth.org.in)
It is also important to note that a large numbers of people in India and vast parts of the still emerging world do not have access to water, forget its portability.
- Climate Issues Take a Backseat:
Before the coronavirus, momentum seemed to be building behind governments and businesses taking steps to address climate change. As 2020 began, wildfires were destroying vast swaths of Australia; and the climate activist Greta Thunberg had become a household name. But the spread of the coronavirus has thrown an even more urgent crisis at governments and business: how to save the lives of millions of people, prevent health care systems from collapsing, and shore up economies that must now enter something comparable to an induced coma.
In conclusion, the coronavirus crisis has been having short term positive environmental effects but long term negative effects on the environment. Production has decreased, there’s less pressure on energy resources, less fuel burnt in transportation, fewer carbon emissions, and less air pollution. However, all of this is temporary and in the long term, the environmental impacts of the coronavirus such as water shortage, increase in plastic production and waste and issues relating to correct waste disposable, to name a few, will pose as a greater problem.