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2022年2月4日 · The update states that cloth face coverings offer the least protection from the coronavirus compared with surgical masks or N95-style masks. Christian L'Orange is a mechanical engineer who has been testing the performance of masks for the state of Colorado since the beginning of the pandemic. He explains the new CDC guidelines and the science ...
2020年8月6日 · Face masks have become part of our daily life as a result of the coronavirus pandemic, But aside from limiting the transmission of COVID-19, disposable plastic masks are having a devastating effect on the planet, adding to the world's growing plastic problem. The fight against plastic pollution is being hit by the COVID-19 pandemic, as the use ...
2020年8月12日 · These are some of the things we’ve learned: Masks and face coverings can prevent the wearer from transmitting the COVID-19 virus to others and may provide some protection to the wearer. Multiple studies have shown that face coverings can contain droplets expelled from the wearer, which are responsible for the majority of transmission of the ...
2021年12月14日 · We looked at 11 countries, including the UK, and compared the litter trends with each country’s approach to dealing with COVID-19. While we expected to see a rise in mask litter, we were surprised by how much it rose. Across the 11 countries in our study there was an almost 9,000% increase in masks as a proportion of all litter from September ...
2021年7月23日 · Penalties. Many have introduced fines for those flouting mask rules. Some including Chile, Morocco, South Africa and Kuwait have also threatened jail, with Qatar bringing in terms of up to three years and fines of as much as $55,000. Dubai has used drones with facial recognition software to spot people without masks, catching 518 in early 2021 ...
2022年1月4日 · Microfluidics on nanomaterials. Scientists in the UK are using nanomaterials to create a face mask designed to stop the spread of COVID-19. The team at the University of Aberdeen is using a technology called microfluidics, which would harness silver nanoparticles to turn masks into active barriers and increase their efficiency.
2020年6月11日 · Coronavirus waste has become a new form of pollution as single-use personal protective equipment (PPE) floods our ocean. COVID-19 has had a number of unexpected impacts on the environment, curtailing recycling and increasing the use of plastic around the world. Governments need to act now to ensure a green recovery that incentivizes sustainability.
2020年8月7日 · The abaca tree, a relative of the banana, produces fibre that’s being made into COVID-19 PPE products, including facemasks. Conservationists say single-use plastic PPE is adding to marine pollution. Abaca fibres - used in banknotes, teabags and Mercedes Benz cars - are as tough as polyester but break down organically.
2020年6月5日 · WHO updates its mask guidance for health workers and the general population. The World Health Organization (WHO) shared new guidance regarding mask wearing at today's coronavirus briefing for health workers and the general public based on a review of evolving evidence. WHO officials stressed that the new advice is an update to previous guidance ...
2020年7月31日 · People around the world are making their own face masks to help prevent transmission of COVID-19, yet many are no more useful than face coverings. Coronavirus particles are about 0.08 micrometres and the weaves within a typical cloth face-covering have gaps about 1,000 times bigger. These two tests can be done at home at low cost.
