Impact of the COVID-19 pandemic on the environment

Images from the NASA Earth Observatory show a stark drop in pollution in Wuhan, when comparing NO2 levels in early 2019 (top) and early 2020 (bottom).[1]

The COVID-19 pandemic has had an impact on the environment, with changes in human activity leading to temporary changes in air pollution, greenhouse gas emissions and water quality. As the pandemic became a global health crisis in early 2020, various national responses including lockdowns and travel restrictions caused substantial disruption to society, travel, energy usage and economic activity, sometimes referred to as the "anthropause". As public health measures were lifted later in the pandemic, its impact has sometimes been discussed in terms of effects on implementing renewable energy transition and climate change mitigation.

With the onset of the pandemic, some positive effects on the environment as a result of human inactivity were observed. In 2020, carbon dioxide emissions fell by 6.4% or 2.3 billion tonnes globally.[2] In April 2020, NOx emissions fell by up to 30%.[3] In China, lockdowns and other measures resulted in a 26% decrease in coal consumption, and a 50% reduction in nitrogen oxide emissions.[4] Greenhouse gas emissions rebounded later in the pandemic as many countries began lifting restrictions, with the direct impact of pandemic policies having a negligible long-term impact on climate change.[2][5]

Some developed nations introduced so-called "green recovery" economic stimulus packages, aiming to boost economic growth while facilitating renewable energy transition. One of these investments was the European Union's seven-year €1 trillion budget proposal and €750 billion recovery plan, "Next Generation EU", which seeks to reserve 25% of EU spending for climate-friendly expenditure.[6][7][8]

However, decreased human activity during the pandemic diverted attention from ongoing activities such as accelerated deforestation of the Amazon rainforest[9][10] and increased poaching in parts of Africa.[11][12] The hindrance of environmental policy efforts, combined with economic slowdown may have contributed to slowed investment in green energy technologies.[13][14]

The pandemic also led to increased medical waste. Production and use of medical equipment such as personal protective equipment contributed to plastic waste.[15] The medical response required a larger than normal number of masks, gloves, needles, syringes, and medications.[4] During 2020, approximately 65 billion gloves and 129 billion face masks were used every month, and were disposed of.[15] Enforced public use of PPE has posed challenges to conventional waste management.[16] Greenhouse gas emissions resulting from the treatment process of this plastic waste ranged from 14 to 33.5 tons of CO2 per ton of mask, the largest share being from production and transport.[17]

  1. ^ "Earth Observatory". 28 February 2020. Archived from the original on 2 April 2020. Retrieved 9 April 2020.
  2. ^ a b Cite error: The named reference :21 was invoked but never defined (see the help page).
  3. ^ Forster PM, Forster HI, Evans MJ, Gidden MJ, Jones CD, Keller CA, et al. (August 2020). "Erratum: Publisher Correction: Current and future global climate impacts resulting from COVID-19". Nature Climate Change. 10 (10): 971. doi:10.1038/s41558-020-0904-z. PMC 7427494. PMID 32845944.
  4. ^ a b Rume T, Islam SM (September 2020). "Environmental effects of COVID-19 pandemic and potential strategies of sustainability". Heliyon. 6 (9): e04965. Bibcode:2020Heliy...604965R. doi:10.1016/j.heliyon.2020.e04965. PMC 7498239. PMID 32964165.
  5. ^ Cite error: The named reference effectspaper was invoked but never defined (see the help page).
  6. ^ Simon F (27 May 2020). "'Do no harm': EU recovery fund has green strings attached". www.euractiv.com. Retrieved 4 June 2020.
  7. ^ Carpenter S. "As Europe Unveils 'Green' Recovery Package, Trans-Atlantic Rift On Climate Policy Widens". Forbes. Retrieved 4 June 2020.
  8. ^ "France and Germany Bring European Recovery Fund Proposal to Table". South EU Summit. 4 June 2020. Archived from the original on 18 January 2021. Retrieved 4 June 2020.
  9. ^ "Deforestation of the Amazon has soared under cover of the coronavirus". NBC News. 11 May 2020.
  10. ^ "Deforestation of Amazon rainforest accelerates amid COVID-19 pandemic". ABC News. 6 May 2020.
  11. ^ "Conservationists fear African animal poaching will increase during COVID-19 pandemic". ABC News. 14 April 2020.
  12. ^ "'Filthy bloody business:' Poachers kill more animals as coronavirus crushes tourism to Africa". CNBC. 24 April 2020.
  13. ^ "Cop26 climate talks postponed to 2021 amid coronavirus pandemic". Climate Home News. 1 April 2020. Archived from the original on 4 April 2020. Retrieved 2 April 2020.
  14. ^ Newburger E (13 March 2020). "Coronavirus could weaken climate change action and hit clean energy investment, researchers warn". CNBC. Archived from the original on 15 March 2020. Retrieved 16 March 2020.
  15. ^ a b Aragaw TA, Mekonnen BA (20 January 2021). "Current plastics pollution threats due to COVID-19 and its possible mitigation techniques: a waste-to-energy conversion via Pyrolysis". Environmental Systems Research. 10 (1): 8. Bibcode:2021EnvSR..10....8A. doi:10.1186/s40068-020-00217-x. PMC 7816145. PMID 34777936.
  16. ^ Ardusso M, Forero-López AD, Buzzi NS, Spetter CV, Fernández-Severini MD (April 2021). "COVID-19 pandemic repercussions on plastic and antiviral polymeric textile causing pollution on beaches and coasts of South America". The Science of the Total Environment. 763: 144365. Bibcode:2021ScTEn.76344365A. doi:10.1016/j.scitotenv.2020.144365. PMC 7726578. PMID 33360513.
  17. ^ Goodno BJ (2021). Mechanics of materials. Cengage Learning. ISBN 978-0-357-37785-7. OCLC 1140170160.