The plastic problem

Plastic pollution is one of the most pressing environmental issues that many countries struggle with worldwide. During the last decade, the detrimental effects of plastics on the environment and human health have been extensively researched. Experts all agree that plastic is harmful to humans and it takes over 1000 years to decay, degrading into microplastics and accumulating in ecosystems.

Microplastics are particularly persistent in the environment and hard to capture and recycle. It is important to note that they are not just a result of the breakdown of bigger plastic pieces, but are also produced, for instance, by cosmetic firms to be included in a range of cosmetic products. Hence, after usage of these products the microplastics get washed down the drain, move through the wastewater treatment system, and end up in rivers and oceans. Once released into aquatic ecosystems, the tiny plastic particles are taken up via the food chain and accumulate in the higher trophic levels, in a process known as bioaccumulation. Moreover, microplastics can accrue in the soil, affecting plant growth and soil biota.

The problem with bioaccumulation of plastics are specific properties that have been proven to affect the endocrine system of mammals. By binding to hormone receptors, ingested plastic will result in a downstream cellular effect, leading to developmental changes. Fish have been known to feminize, resulting in detrimental effects on the ecosystem and harming multiple relationship chains established throughout the systems.

Humans ingest plastics through food, handling receipts and drinking from plastic water bottles. This problem has been analysed by researchers at the University of Bayreuth, who in a recent study have detected various types of microplastics in mussels obtained from supermarkets. With microplastics present in food obtained from the supermarket, it seems impossible for us to avoid it in our daily lives. This illustrates how careless actions stemming from short-term convenience not only devastate long-established ecosystem dynamics, but also end up affecting us humans for decades to come.     

Besides the effects of microplastic, the plastic litter in form of bigger pieces, called macroplastic, has a wide range of implications on the environment and ecosystems as well. These include entanglement, ingestion, and suffocation for organisms in marine and terrestrial environments.

Plastic usage in times of the Covid-19 pandemic

As the plastic pollution problem has been reported more and more in the media, the resulting rise in awareness of the effects of plastic usage on the environment greatly impacted governmental decision-making. New laws and specific legislation concerning plastic production and consumption were established. Several countries, including the EU and some U.S. States, started banning or were planning to ban single-use plastics, such as straws, cups and shopping bags, as well as the production of microbeads, which are commonly used in cosmetic products such as face scrubs and soaps. However, the Covid-19 pandemic has drastically affected the global efforts of tackling the plastic problem.

The pandemic has led to an arms race for personal protective equipment (PPE) all over the world. With an increase in both medical equipment such as facemasks, gloves and other protective clothing, as well as single-use plastics from food packaging, home-delivery services and e-commerce, the production and consumption of plastic immensely rose. Commitment to wear a mask has drastically increased the production of one-off masks and the resulting littering. It is estimated that there is a monthly need for 129 billion face masks and 65 billion gloves to contain the spread of the virus on a global scale. A large part of these can now be found as rubbish on the pavement or at the side of the road. In combination with other medical equipment, the resulting waste in the medical sector alone has increased to up to 370%.  

Social trends amplifying this problem include a growth in the throw away culture and online shopping, as well as the increased demand for food delivery and take-away packaging. This is a direct result of the fear-driven perceptions of hygienic and recycled products, as well as the Covid-19 associated sanitary concerns. Estimations predict a 14% increase in plastic and corrugated grocery packaging in the U.S., while reports from a Spanish plastic packaging company show a sales increase of 40%. Additionally, the low oil prices caused by the crisis have reduced the competitiveness of recycled plastics, leading to an increased usage of virgin plastics.

Due to the growing demand for plastic, there has been a temporary relaxation on the policies banning or reducing single-use plastics in many places around the world, including several U.S. States. This reversal or delay of policies relevant for the reduction in global plastic use will result in plastic industry lobbyists taking advantage of the situation, making future implementation of similar guidelines and laws very difficult. It is therefore important to address the fear-driven perceptions against the hygiene of reused and recycled products now, during as well as after the pandemic. It is important to increase people’s trust in packaging-free products and sustainable alternatives to prevent a lasting return of the throwaway culture and thus a resurgence in the use of single-use plastic. An overarching message here is the importance of continuing to move forward with a total system overhaul to make using reusables a safe and convenient option despite the pandemic.  

Waste management in times of the Covid-19 pandemic

Coming back to the example of our campus: The university was quick to respond to the littering problem by putting up more bins, specifically for plastic recycling. However, the increasing plastic waste remains an issue and the pandemic has negatively impacted the recycling sector as well.

In some countries, like Portugal, the government recommended not to recycle any possibly contaminated household waste and in Italy infected people were asked not to sort their waste at all. In the U.S. the recycling capacity was significantly lowered by recycling companies closing due to decreased demand from the industry, low oil prices favouring the use of virgin plastic over recycled plastic and fear of spreading the virus via recycled materials. In other countries, like the Netherlands, there was a backlog of recycling waste due to disruption in logistics.

Therefore, the motioned changes in the usage of plastics have implications for global waste management. The fact that already before the pandemic over two billion people lacked access to waste collection and over three billion people lacked access to waste disposal amplifies the current situation during the crisis.

As the failure to properly manage the waste generated from health facilities and households may escalate the spread of Covid-19 via secondary transmission, the virus creates additional challenges in waste management, including waste management practices and both environmental and global issues. These effects, including future solutions, are illustrated in the infographic shown here:

Conclusion

The Covid-19 pandemic has led to a severe increase in the usage and disposal of single use plastic products. Some countries waste management facilities can not cope with the resulting amounts of waste, which consequently means an improper treatment of the surplus plastic waste. In combination with littering of PPE and other single use plastic products this will result in an increased plastic pollution in the environment, where it will persist for decades and negatively impact ecosystems. Since the pandemic has been going on for over a year and an end is not in sight yet, it is important to take notice of this issue and find ways to reduce our plastic consumption whilst keeping to current hygiene regulations.

References:

Aragaw, T. A. (2020). Surgical face masks as a potential source for microplastic pollution in the COVID-19 scenario. Marine Pollution Bulletin, 159, 111517. https://doi.org/10.1016/j.marpolbul.2020.111517  

Gorrasi, G., Sorrentino, A., & Lichtfouse, E. (2020). Back to plastic pollution in COVID times. Environmental Chemistry Letters. doi:10.1007/s10311-020-01129-z

Greenpeace (2020). “Where did 5,500 tonnes of discarded face masks end up?”. Retrieved from: https://www.greenpeace.org/international/story/44629/where-did-5500-tonnes-of-discarded-face-masks-end-up/  

Kargar, S., Pourmehdi, M., & Paydar, M. M. (2020). Reverse logistics network design for medical waste management in the epidemic outbreak of the novel coronavirus (COVID-19). Science of The Total Environment, 746, 141183.  https://doi.org/10.1016/j.scitotenv.2020.141183 

Kulkarni B. N., Anantharama V. (2020). Repercussions [BC1] of COVID-19 pandemic on municipal solid waste management: Challenges and opportunities. Science of the Total Environment, 743, 140693[BC2] . https://doi.org/10.1021/acs.est.0c02178

Kumar BNV, Löschel LA, Imhof HK, Löder MGJ, Laforsch C. (2021). Analysis of microplastics of a broad size range in commercially important mussels by combining FTIR and Raman spectroscopy approaches. Environmental Pollution , 269, 116147. https://doi.org/10.1016/j.envpol.2020.116147

Nowakowski, P., Kuśnierz, S., Sosna, P., Mauer, J., & Maj, D. (2020). Disposal of personal protective equipment during the COVID-19 pandemic Is a challenge for waste collection companies and society: A case study in Poland. Resources, 9(10), 116. https://doi.org/10.3390/resources9100116

Prata, J. C., Silva, A. L., Walker, T. R., Duarte, A. C., & Rocha-Santos, T. (2020). COVID-19 pandemic repercussions on the use and management of plastics. Environmental Science & Technology, 54(13), 7760-7765. https://dx.doi.org/10.1021/acs.est.0c02178

Sarkodie S. A., Owusu P. A. (2020). Impact of COVID-19 pandemic on waste management. Environment, Development and Sustainability. https://doi.org/10.1007/s10668-020-00956-y

Sharma, H. B., Vanapalli, K. R., Cheela, V. S., Ranjan, V. P., Jaglan, A. K., Dubey, B., Goel S., Bhattacharya, J. (2020). Challenges, opportunities, and innovations for effective solid waste management during and post COVID-19 pandemic. Resources, Conservation and Recycling, 162, 105052. https://doi.org/10.1016/j.resconrec.2020.105052

Silva A.L.P., Prata J.C., Walker T.R., Duarte A.C., Ouyang W., Barcelò D., Rocha-Santos T. (2020). Increased plastic pollution due to COVID-19 pandemic: Challenges and recommendations. Chemical Engineering Journal, 405, 126683. https://doi.org/10.1016/j.cej.2020.126683

Vanapalli, K. R., Sharma, H. B., Ranjan, V. P., Samal, B., Bhattacharya, J., Dubey, B. K., & Goel, S. (2020). Challenges and strategies for effective plastic waste management during and post COVID-19 pandemic. Science of The Total Environment, 750, 141514. https://doi.org/10.1016/j.scitotenv.2020.141514

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Next, we are walking into the “cloud forest greenhouse”. Compared to the previous greenhouse, it is becoming cooler. Here, we have a look on Chlorophytum comosum, one of the most commonly used house plants. Because it is so simple to propagate the plant, which has its origin in Africa, market gardens usually do not try to sell them. Chlorophytum comosum is very effective in reducing formaldehyde concentrations indoors.

Photo: Chlorophytum comosum is a popular house plant

The next stop is in the “dry forest greenhouse”. Here, the air is comparatively warm and dry (at that time, the dry season is simulated in the greenhouse). Plants from those climatic regions can cope with little water and dry air which means that such house plants also survive close to heating installations in rooms. In the greenhouse, Mr. Aas shows us a species of the genus Sansevieria. Species of this genus are mainly growing in Africa, in particular in Kenya and Tanzania, but also on the Arabian Peninsula. They are helpful to “clean” the room air in flats where residents are smoking (mainly benzene and trichloroethane).

Photo: Species of the genus Sansevieria filter toxic substances out of the room air

In the “Mediterranean and Subtropical greenhouse” the air is cooler and smells pleasant. House plants which have their origin in such climatic regions have a difficult life in houses in Germany. They would need colder winters than the temperature in rooms usually is and it would be better to put them out during summer. Euphorbia pulcherrima, better known as “poinsettia”, is a popular house plant during the Advent season. The natural wild plant grows along the Pacific coast of Central America. In nature, the species blossoms and develops its characteristic intensive coloured bracts during the dry period in winter when the sun is shining less than 12 hours/day. That is why poinsettias are artificially darkened in greenhouses in market gardens in Central Europe from October to make sure that the plants have intensive coloured bracts when the Advent season starts. The plants are usually thrown away when they are wilting although they could be cultivated further.

Photo: “Poinsettia” is a popular house plant during the Advent season

Finally, Mr. Aas guides us into the “Mangrove greenhouse”. Here, he talks about Monstera deliciosa which originally comes from tropical regions in America. It is one of the typical house plants and “hip” again these days. After that, the tour ends where it started: in the “tropical forest greenhouse”.

Photo: Monstera deliciosa is a “hip” house plant these days

The botanical guided tour was very enlightening and Mr. Aas had interesting stories to tell about every plant he showed to us.
Next time I am visiting a garden centre, I will not focus on the beauty of the house plants only but also on the functions which the respective plant on our health and well-being has. As a result of the tour, I want to make sure that my first office will be green with the aid of house plants and I recommend others to do the same. House plants are beautiful, motivating and healthy.

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But why is the demand for palm oil that high? It is everywhere, literally. We can find it in our food – the most famous example might be Nutella – but also in other groceries like muesli or pastry. Sanitary products like body lotions, shower gels, deodorants – a huge majority of them contains palm oil. The oil is obtained from the shell of the fruit by pressure. The fruit of the oil palm is much more effective – compared to sunflowers or rapeseed which both are also used for oil production, the oil palm needs much less area to grow. As we are living in a consumption-based society, the call for more palm oil gets louder; the number of plantations is rising and thus the area of pristine tropical forests is shrinking.

Ecological and financial impacts of the palm oil industry

According to World Wildlife Fund (WWF), the impacts of palm oil production are alarming: Fire clearing leads to habitat loss and fragmentation of habitats that are normally home to many endangered species. The fires of the burning forests release substances into the air such as carbon dioxide. They pollute the air and have therefore heavy impacts on the health of the people living in the areas where fire clearing is actually happening. WWF also mentions climate change as a consequence because tropical forests are major carbon sinks – by burning them, the CO2 stored in the plants is released into the atmosphere and thus accelerates the warming of our planet.

A FAO report from 2014 revealed that the top exporters and therefore also top producers of palm oil are Malaysia and Indonesia. A figure in this report shows that India and China are by far the biggest importers of the oil produced in South East Asia: India bought palm oil from Indonesia for 4340 million dollars, China came close by spending 2389 million to Malaysia and 1868 million dollars to Indonesia. Obviously, the palm oil market is booming. But Germany can’t deny its own portion of the share: It is one of the major importers of Malaysian palm oil as well. According to a WWF Germany report, Germany imported 1,5 million tons of palm oil in the year 2013; most of that palm oil is used for bio fuel and food production.

Alternatives don’t solve the problem

Palm oil is evil – this thought has been fixed in the minds of many. But there is (as in so many cases) also another side of the medal. In 2016, the WWF Germany has published a report about the consequences of palm oil cultivation. In this report, also alternatives are analysed: It finds that replacing palm oil with alternative oils like coconut or soy oil would even worsen the situation because they need much more area to grow and produce less oil.

The solution for this dilemma is actually quite simple. If we stopped using palm oil as biomass fuel and if we established a more conscious consume of chocolate, chips, other sweets and instant meals, we could reduce the current use of palm oil by 50%.

But instead of only saying if, if, if we should start acting. Therefore, I am going to start an experiment next week: I want to figure out, which products in my day to day life contain palm oil or palm-oil-based ingredients and try to reduce them. In the last year, I already tried to reduce the use of those products, but I guess that there is still a lot to do. But as the WWF example showed, a total ban of palm oil is not the way to go. That is why I also want to check for alternative solutions or ideas how to replace products that are a threat to our environment.

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