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COVID-19: Is the future more plastic?

   Since 2018 when China started the ban on plastic waste imports, developed countries have been in a movement to reduce plastic wastes. However, under the influence of the unprecedented COVID-19 pandemic, we may now need to re-think the question: Is the future more plastic?
Protecting health or the environment?
   For our current battle to fight the COVID-19 pandemic, we see a dramatically increasing demand for personal protective equipment such as surgical masks, pill casings, disposal syringes, catheter, and blood bags. These items are also made of synthetic polymers such as polyvinyl chloride (PVC) and PP, which are not biodegradable. Therefore, it would be not surprising to see that the COVID-19 pandemic is generating tons of medical waste.
   Not only in the medical sector has the pandemic caused increasing amounts of plastic waste. To stop of the spread of the coronavirus, social distancing rules have been introduced and we have to practice better hygiene than usual. Disposable polyethylene (PE) gloves are more commonly used by people going outside for shopping or other purposes where they need to avoid touching surfaces.
   
PE is the same polymer used for plastic shopping bags worldwide, which has already caused tremendous environmental issues. During the lockdown, many people are also ordering more food deliveries and takeaways, which means increasing amounts of disposable meal boxes are being used, which are commonly made of PP or polystyrene (PS). Thus, the fear over the coronavirus has actually pushed people to use more plastic than usual. Some governments such as England, California, and South Australia have recently called off the ban on single-use plastic to reduce the coronavirus risk.
   
More plastic or more sustainable?
Admittedly, plastic is indispensable to us, especially for protecting our health. This is why we have been facing huge challenges to reduce plastic waste while maintaining our existing lifestyle. While this COVID-19 pandemic is just temporary, plastic pollution could be long lasting, and if we do not take urgent and proper actions now, it will negatively impact our health, wildlife, and the natural environment in the long term. But, can we protect our health while still minimizing the negative impact of plastic on our environment?
  
While reducing or even avoiding the use of unnecessary plastic could definitely help to reduce plastic waste, using disposable plastic items in many cases remains an important option particularly for hygiene and convenience purposes. However, using disposables does not necessarily mean more pollution. Boomerang Alliance's Plastic Free Places program has provided a guide to cafes and restaurants of how to avoid single-use plastics and what compostable packaging alternatives are available.

Disposables can be made from biomass resources or of biodegradable or compostable plastics. "Biodegradable" plastics can decompose into harmless, small molecules with the action of living organisms in the natural environment (such as in soil). For "compostable" plastics to break down into simpler chemical compounds, composting facilities with controlled conditions (e.g., added nutrients and certain temperature) is required. Polylactide (PLA) is a compostable bioplastic made from the sugars from fermented starch (e.g., corn and cassava), sugarcane or sugar beet. Polyhydroxyalkanoate (PHA) is a biodegradable polymer produced by microorganisms (bacteria) from organic matters like sugar or lipids. There are many biomass resources such as cellulose, chitin/chitosan, starch, lignin, and alginate, which can be used to make biodegradable materials, too. Of course, proper labelling and guidance are still needed for the appropriate disposal of biodegradables and compostables, which is the same thing for plastic recycling.  
   Battling plastic waste is much more complex than fighting COVID-19 and it needs governments, NGO's, industry, researchers, and the public to work together to form synergistic approaches. We aim to achieve both sustainability and healthier life, but only by continuing to take proactive steps and behave more responsibly for the sake of the environment and ourselves.

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