Despite the significant negative socio-economic impact of the COVID-19 pandemic, lockdown of cities and enforcement of social distancing across the world have brought some relief to the environment, evidenced in better air and water quality as well as reduced greenhouse gas emissions. However, the environmental picture of this pandemic is not all bright and encouraging.
A recent survey by Ontario Waste Management Association shows that the household garbage over the period of March 9th to April 13 has increased by 5% compared to the same period in 2019. There are also multiple reports of the increase in hospital waste, as much as six times at the peak of the outbreak in comparison to the time before the crisis. In addition, concerns over littering due to improper disposal of gloves and masks are growing in different municipalities, and as the new normal with the COVID-19 threat may widely require compulsory mask wearing, not only littering but also the landfilled waste generated due to single-use masks will further pollute the environment.
In this article, we briefly discuss the relevance of the 5R strategy with respect to the efforts aiming to combat COVID-19. At the early stages, the urgency of minimizing the health risk and addressing the supply shortage for personal protective equipment (PPE) might have hindered a holistic and environmentally conscious approach. However, as we are planning a long-term strategy for the current and possible future pandemics, considering other factors in developing solutions are more feasible and deemed necessary.
Reuse
While N95 respirators, a type of mask that can filter at least 95% of airborne particles, are designed for single-use, recent studies have been conducted to understand the impact of various decontamination methods on material, fit and seal performance of these masks with the goal of developing guidelines for their reuse. For example, it has been reported that treating N95 with vaporized hydrogen peroxide allows for three reuse cycles before the masks lose their efficacy. This path of studies need to be continued and expanded on all personal protective equipment as well as related single-use devices, such as breathing circuits, to thoroughly identify opportunities for reuse without compromising health and safety. In addition, manufacturers of these equipment and devices can play an important role by bringing design for reusability in their practice to expand the potentials of their products for challenging times as the one we are experiencing with COVID-19. Also, when it comes to public health, the potential efficacy of non-medical masks to contain the spread of the virus can open up more opportunities for reuse, e.g., through washing, which might not be applicable to the ones used by healthcare providers.
Reduce
Innovation in materials can reduce the waste generated by disposable PPE through, for example, reducing the thickness of the final product or enhancing its durability to avoid failure during service (check glove producer Eagle for an example of such efforts). The reduction in material use can also be achieved by changing the public behavior. For example, while wearing masks have been encouraged by health officials, such recommendations for gloves have not been provided and even some have questioned wearing them in public places as a protective measure. Clearly, discouraging the use of gloves can reduce the amount of plastic waste generated.
Recycle
Whereas there are already programs in place to manage the recycling of non-hazardous gloves (e.g., the RightCycle program by Kimberly-Clark for its Nitrile gloves, or the partnership between Eagle and TerraCycle), the contamination and health risks associated with gloves and other plastic PPE is preventing these products to be handled and processed for recycling. Despite this, the opportunity for improving circularity and recyclability of their packaging is not constrained.
Renew
Using bio-based, biodegradable or compostable materials in manufacturing of PPE and single-use medical devices can help alleviate the excessive use of these products during outbreak situations. For example, there has been some efforts in making gowns and other protective equipment using polylactic acid (PLA) which is a naturally sourced, biodegradable plastic. However, the potential decomposition of a material in nature or in a composting facility does not necessarily give them the credibility of a sustainable and circular product. For example, while latex gloves, which are made of natural rubber, are biodegradable, the chemical additives present in the product can be harmful to the environment.
Remanufacture
Ventilators became a priority equipment for hospitals to treat COVID-19 patients experiencing severe symptoms. Their shortage at the peak of the outbreak stimulated the manufacturing and supply of many of these devices across the world. While the initial designs of these ventilators might not facilitate extended life, reparability and remanufacturability, designers and manufacturers can take initiatives to enhance the circularity of these devices and ensure their long-run operations.
Karan is an experienced professional who has worked in multiple geographies and roles along his career. He holds a total of 10+ years of experience in manufacturing operations, and has focused his efforts towards finding solutions for waste recovery and making recovery economical for industries. 
As our Senior Research Scientist, Hormoz draws on his eight years of industrial and nine years of academic research experience in the areas of polymer science and engineering to develop new solutions for advancing circularity and sustainability.
As the Co-founder of 5REDO, Forough brings her expertise in supply chain management, business operations, inventory control, and revenue management to support the implementation of circular solutions within different industry sectors.
With her significant hands-on experience in developing and characterizing biological and chemical systems, Vicky plays a key role in 5REDO’s efforts toward developing novel products and technologies that offer improved circularity and sustainability to the industry and society. 
With several years of research experience in France and Canada, Fabien lends his expertise and passion for enzymology and microbiology to 5REDO’s sustainability innovation plans. 
With a passion for driving change and creating impact, Mahdi co-founded 5REDO to facilitate and expedite the adoption of circular economy principles in Canada. Mahdi is an alumnus of the Ellen MacArthur Foundation’s From Linear to Circular Programme in 2021. He also played a key role in developing and managing the University of British Columbia’s (UBC) Circular Economy Seed Funding program aimed at fostering partnership development between companies and academic researchers to co-create solutions for the circular economy. 
By leveraging her expertise in life cycle analysis and process engineering, Ophela helps 5REDO to take a holistic approach to the development of circular solutions and technologies. 
As a recent graduate of chemical engineering from the University of Waterloo, Kyle brings his passion for impactful innovation and his experience with novel recycling processes to 5REDO to support our technology development initiatives. 
Shauna is a freelance journalist that covers a wide range of topics, including health, education, the environment, travel, lifestyle trends, and more. She holds a Master of Journalism from Carleton University, and a Bachelor of Arts (Honours) in Global Development from Queen’s University.