Coffee at Home: Packaging beans

People who prepare their coffee from the beans usually get them prepackaged in a bag. Different brands of coffee sell their prepacked beans in different kinds of bags, ranging from plastic to paper. These packages attribute only about 3% of the coffee industry's carbon footprint (Fornero, 2020), and as such its impacts on the environment are less discussed than the other pollutive processes in the industry.

According to a study by Salomone (2003), packaging contributes negligibly to greenhouse gases emissions, ecotoxicity, and ozone layer depletion. This suggests that attention on packaging used in the coffee industry is not the main concern when dealing with environmental impacts. While true that there are bigger pollutants in the coffee industry, unsustainable packaging has been forefronted by many climate change activists, making the topic of sustainable packaging relevant in today's context. 

The problem of packaging is similar to that of coffee cups, which was previously discussed. The ambiguous and misleading logos indicating that the packages are recyclable are just not helping consumers to understand the proper means of recycling. Many times, packages containing beans would be made of two or more materials. This would mean that for effective recycling, materials must be separated, else, it would be as good as throwing them into the landfills.

While some may argue that there are biodegradable packaging available, it is found that only up to 60% of materials from such packages can biodegrade (Fornero, 2020). However, depending on the materials, the remaining 40% can be recycled in their corresponding bins. In this sense, biodegradable packaging seems like a favourable alternative to recyclable bags. However, to really reap the benefits of such packages, people have to step up and play their part in recycling. This seems difficult as recycling rates in many countries fall below 50%, suggesting that the non-biodegradables are highly likely to end up in landfills.

To conclude, coffee packaging contributes little to the pollution brought about by the coffee industry. However, that should not be a reason to ignore the problem as a little bit of pollution goes a long way, especially when we consider the size of the industry. While 'biodegradable' packaging is currently the most sustainable packaging available, consumers have to start recycling properly to reap the full benefits of such packages.

Coffee at Home: Are coffee pods problematic?

Since the popularisation of Nespresso coffee pods in 1988, coffee consumers have had the luxury and convenience to enjoy a cup of coffee almost instantly and comfortably in their homes. Despite the proliferation of coffee pods from alternative brands following the loss of Nespresso's coffee pod patent, Nespresso pods remain the go-to for coffee pod consumers. However, Nespresso pods are coming under scrutiny in the 21st century, as there has been a growing awareness that the excessive use of coffee pods are polluting the environment, with many of them ending up in landfills instead of proper recycling facilities (Grant, 2020). 

Figure 1: Nespresso pods end up in landfills as they are improperly disposed of. Image source: Huntsdale, 2019.

This is a shame as Moskvitch (2019), who corroborated the finding of different researches, found that coffee pods are made of materials that are highly recyclable. The Nespresso pod, for instance, is made primarily of aluminium, which is a metal that can be easily melted and reused repeated. The catch for Nespresso pods is that they contain a silicon layer, which requires specific technologies to remove before recycling can take place. As such, consumers using Nespresso pods are required to return the pods back to Nespresso's collection points, should they wish to recycle.

Expectedly, recycling rates are low. In 2018, in the UK alone, 42% of coffee pod users throw the pods away after use. This is in spite of Nespresso's efforts to expand its recycling efforts to reach 100% recycling rates by 2020 (the goal was not achieved), by increasing its global capsule recycling points (Grant, 2020). Evidently, besides making the recycling facilities convenient to consumers, awareness of such facilities must also be strengthened. Additionally, while Nespresso wishes to define their capsules through the silicon layer embedded in their capsules (Moskvitch, 2019), removing the silicon would make the capsules more recycle-friendly, as typical recycling plants will then have the capacity to recycle these pods.

In essence, to improve recycling rates and reduce pollution of Nespresso coffee pods, the mindsets of both consumers and the Nespresso company need to change. Consumers have to be more active in recycling, and Nespresso needs to forgo its ego so that its coffee pods can be easily recycled.

Coffee to Go: The Disposable Replacement

Takeaway cups provided by cafes are typically made of paper or plastic for practical reasons. Perhaps, the biggest reason being their cost-effectiveness. However, in a cafe's pursuit of cost savings, it brings about a larger opportunity cost: the increasing amount of waste generated that, in the grand scheme of things, pollute the different spheres of the Earth. In the previous series, we explored some alternatives to disposable cups usage (biodegradables, reusables etc.). However, each has its own set of problems, like the differentiated waste treatment required, and the low take-up rate for reusable cups. This begs the question: are there other ways to reduce our reliance on disposables, without the need for new technologies?

The simple answer is yes. Like many other sharing platforms that we are familiar with, cup-sharing has been proposed as an alternative to combat our issue at hand. According to Song, Lee and Jung (2020), countries like Germany, some UK countries and South Korea have attempted cup-sharing services, and these services have shown signs of improving the current plight. The article was based primarily on a South Korean University's '0U Cup' cup-sharing program, and their takeaway from the project is that the coffee-to-go scene has to change in order for people's behaviour to change. In other words, cafes have to initiate cup-sharing as a default method of takeaway, and it must be made a trendy effort for the long term success of such sharing services (Song, Lee, & Jung, 2020).

Having a default option (the shared cup) and making the service trendy have to go hand in hand for the cup-sharing to be effective, as people may be repelled by the notion if they are forced to do something, and this is where societal pressure comes in to keep behaviours in check (Croes & Bartels, 2021). This is evident from the high average return rate of 75%, and the fact that cups were generally returned to the cafes deposit box, despite there being other boxes around the campus. 

Given the right conditions, cup-sharing services thus seem like a viable alternative to disposable cups as it saves the cost of restocking disposable cups whenever they run low, and also reduce wastes littered around public spaces and accumulating in landfills. While the cup-sharing service mentioned was only a mini campus project, it would certainly benefit the environment should it be expanded to a wider scale.

Ways to reduce coffee pollution: Composting

The time to reduce coffee pollution is not confined to its production stage. After brewing a cup of joe, the next likely course of action would be to throw the coffee grounds (CG) away. However, these CG, being organic, releases methane upon decomposition, which has a warming effect 84 times higher than that of carbon dioxide (Vaidyanathan, 2015). So what can we do to prevent such pollution?

A quick Google search would most probably direct us to compost CG as they contain potassium and nitrogen that are essential to plant growth. CG can also aerate soils and improve soil drainage, which can improve the roots ability to uptake water and nutrients. 

Image 1: Some benefits of using CG as fertilizer. Source: The Spruce, 2021

A quick guide to starting composting can be found here. The article in the link basically summarises three different ways to use CG as fertilizers. 

Adding CG:

1. directly to the soil

2. into a compost pile

3. into a compost system

Going with the compost pile method would be the safest and most economical route. However, if one decides to add CG directly to the soil, a note of caution would be to avoid adding excessive grounds. Excessive grounds can cake up and prevent water from infiltrating the soil, thereby dehydrating the plants instead of helping them to grow. One may also decide on a compost system, which generally involves purchasing decomposers, which personally can be a little expensive or repulsive.

While composting helps in recycling CG, some have advised against using CG as fertilizers as they can be acidic, and they contain caffeine, which may be detrimental to plant growth (Besemer, 2021). However, spent CG are almost pH neutral and according to trees.com, the caffeine content is less harmful to mature plants than seedlings. This suggests that with proper knowledge on the dos and don'ts, CG as fertilizers can be largely beneficial to our plants at home, and we can save money on fertilizers while reducing pollution.

Image 2: Plants with (left) and without (right) the use of CG fertilizer. Source: Sacha, 2018

Overall, before we start composting, it is best to read up on the good practices and plan out our composting methods. With the proper techniques and enough support for coffee composting, perhaps pollution levels can dip, even just by a little.