Alexei Volkov
Plastic pollution is a pressing global crisis, with over 8.3 billion metric tons of plastic produced since the 1950s, and less than 10% of it recycled. While the emergence of eco-friendly plastics is promising, the recycling process for these products is not as straightforward as it seems. This is especially true for green plastic, which has unique challenges and considerations in the recycling process. Green plastic bottles, for instance, are less desirable for recycling due to the difficulty in processing the green dye, which can discolour other recycled materials.
| Characteristics | Values |
|---|---|
| Is green plastic recyclable? | Yes, but it is harder to recycle than clear plastic. |
| Why is it harder to recycle? | The green dye added to the material makes it harder to recycle. |
| What happens to recycled green plastic? | It is recycled into things like clothes and carpeting, which are more difficult to recycle again. |
| What are some examples of companies moving away from green plastic? | Coca-Cola, Sprite, Seagrams, Fresca, and Mellow Yellow. |
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What You'll Learn
- Green plastic bottles are harder to recycle due to the green dye added to the material
- Coca-Cola is switching from green to clear plastic bottles to improve recyclability
- Bioplastics are a type of eco-friendly plastic made from renewable resources that can break down naturally
- The US plastic-bottle recycling rate is less than 25%
- Chemical recycling of plastic is criticised for generating toxic waste and air pollution
Green plastic bottles are harder to recycle due to the green dye added to the material
Plastic bottles are a major contributor to the global plastic pollution crisis. While recycling is a good step towards reducing this pollution, less than 10% of plastic waste generated worldwide has ever been recycled. The plastic recycling process is complex, and the type of plastic and its colour can affect its recyclability.
Green plastic bottles, for example, are harder to recycle due to the green dye added to the material. This dye causes the PET roll to turn yellow, resulting in a roll that appears dirty even after the normal washing process. Clear recyclables also discolour with each recycling cycle, but the addition of green or other coloured materials intensifies this issue. Blue PET is the only exception, as the cool blue hues counteract the warm yellow hues that recycled PET produces.
The low recyclability of green plastic bottles can be attributed to the discolouration of the recycled material. This discolouration limits the number of times the plastic can be recycled, reducing its quality and applications. As a result, green plastic bottles are recycled into products like clothing and carpeting, which are more challenging to recycle again.
To address this issue, some companies are transitioning from green to clear plastic bottles. For instance, Coca-Cola has decided to package its Sprite drink in clear plastic bottles, claiming that they can be recycled more times. By removing colours from bottles, the quality of the recycled material improves, making it more desirable for future use.
However, critics argue that the problem lies not in the colour but in the single-use nature of the plastic. Coca-Cola, being one of the world's largest producers of single-use plastic waste, has been accused of greenwashing rather than addressing the core issue of plastic pollution.
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Coca-Cola is switching from green to clear plastic bottles to improve recyclability
Coca-Cola has decided to switch from green to clear plastic bottles to improve the recyclability of its products. This change will be implemented in over 100 countries and is expected to be completed in New Zealand by June 2023. Sprite, which has been sold in green bottles since the 1960s, will now be packaged in clear plastic bottles, making them easier to recycle into new bottles. This initiative aligns with Coca-Cola's World Without Waste goal to make 100% of its packaging recyclable and retrieve one bottle for every one sold by 2030.
The primary issue with green plastic bottles lies in the green dye added to the material, which makes it harder to recycle. The green bottles tend to turn the PET (Polyethylene Terephthalate) roll yellow, resulting in a roll that appears dirty even after the standard washing process. Clear plastic bottles, on the other hand, can be recycled multiple times into new bottles without the same discoloration issues.
Additionally, there is a lower market demand for green PET due to its limited applications. The process of recycling green plastic bottles often results in single-use products like clothing and carpet that cannot be recycled again. As a result, green plastic bottles are less desirable for recyclers, and there is a smaller market for them compared to clear plastic bottles.
By switching to clear plastic bottles, Coca-Cola increases the likelihood of its bottles being recycled and supports local recycling systems. This move is a step towards a circular economy, reducing the demand for new plastic and carbon emissions. The company has also invested in recycling infrastructure and consumer education campaigns to ensure that its bottles have the best chance of being recycled.
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Bioplastics are a type of eco-friendly plastic made from renewable resources that can break down naturally
Eco-friendly plastics refer to a group of engineered polymers designed to break down or be recycled in a circular fashion. Bioplastics are a type of eco-friendly plastic made from renewable resources that can break down naturally. They are created with renewable resources and are capable of breaking down naturally. Bioplastics are derived from bio-based polymers, which are synthesised from crops such as corn, soy, sugar cane, and other plants. These crops are annually renewable, reducing the use of fossil fuel resources and lowering the carbon footprint of bioplastics compared to traditional plastics.
Bioplastics also have a faster decomposition rate and are less toxic, omitting bisphenol A (BPA), a hormone disruptor commonly found in traditional plastics. An example of a bioplastic is polylactic acid (PLA), which is derived from corn and is gaining acceptance among producers due to its lower energy consumption and reduced greenhouse gas emissions during degradation.
However, bioplastics are not without their challenges. They require industrial composting facilities to break down properly, and most cities lack the necessary infrastructure. As a result, they often end up in landfills, where they can produce methane, a potent greenhouse gas. Additionally, the production of bioplastics can lead to increased pesticide and fertiliser use, contributing to ozone depletion and requiring extensive land use.
It is important to note that not all green plastics are bioplastics or recyclable. The green colour in plastic bottles, for example, comes from the addition of a green dye, which makes the plastic more challenging to recycle. The low demand for green plastic also makes it less economically viable for recycling. Therefore, while bioplastics offer a more sustainable alternative to traditional plastics, proper disposal methods and infrastructure are crucial to fully realising their environmental benefits.
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The US plastic-bottle recycling rate is less than 25%
The introduction of eco-friendly plastics has further complicated the process. Bioplastics, for example, cannot be recycled with virgin and recycled plastics and must be processed separately. However, because bioplastics and biodegradable plastics look similar to traditional plastics, they are often placed in the wrong recycling bin. This means that bioplastics often end up in the wrong recycling stream and are not recycled properly.
The recycling of PET (or polyethylene terephthalate) bottles, commonly used for beverages, is particularly low. The recycling rate for PET bottles nationwide is about 24%, and this has remained stagnant for a decade. However, in areas with bottle deposit programs, collection rates are much higher, and nearly two-thirds of PET bottles are recycled. A uniform nationwide bottle deposit policy could, therefore, significantly increase recycling rates.
The demand for recycled plastic is also an issue. While recycled PET is highly successful in terms of quality, with new products made from all-recycled material virtually matching the qualities of virgin material, collection is a bottleneck. With the right policies in place to support both the demand and supply of recycled plastic, significant improvements in recycling rates are possible.
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Chemical recycling of plastic is criticised for generating toxic waste and air pollution
The plastic industry has long promised that recycling would solve the problem of plastic waste. However, the issue of plastic waste continues to grow, with global plastic use projected to almost triple by 2060. Recycling has been touted as a solution to counter plastic waste, but it has been largely ineffective in offsetting the impact of rising global plastic production.
The term "chemical recycling" is used by the plastic industry to refer to technologies such as pyrolysis, gasification, solvolysis, and solvent-based purification. Pyrolysis, which accounts for 80% of all "chemical recycling" facilities in the US, is a form of incineration with serious toxic impacts. It is regulated under the federal Clean Air Act. However, pyrolysis can only process a tiny fraction of plastic waste into new plastic. A study by the National Renewable Energy Lab found that only 0.1 to 6% of plastic waste can become new plastic when processed through pyrolysis.
Despite the existence of current and emerging technologies to recycle plastic waste, non-recoverable tiny plastic particles (microplastics) cannot be addressed with existing collection methods due to their small size. The size reduction during mechanical recycling also tends to release microplastics into the environment. Furthermore, the leaching of harmful plastic chemicals during and after recycling poses a significant threat to human health and the environment.
Chemical recycling facilities have been identified as potential hotspots for toxic and hazardous waste generation. A review of eight such facilities in the US found that they generate large quantities of hazardous waste and hazardous air pollutants. These facilities are often located in low-income and minority communities, exacerbating environmental justice concerns.
To address the plastic waste crisis, it is crucial to reduce plastic production and promote greater transparency about "chemical recycling." Policies should ensure the protection of communities disproportionately impacted by these facilities and prevent greenwashing of plastic-to-fuel processes as recycling.
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Frequently asked questions
Yes, green plastic is recyclable. However, green plastic bottles are more often recycled into things like clothes and carpeting, which are more difficult to recycle again.
Clear plastic is more easily recycled. Green bottles tend to make the PET roll yellow, resulting in a roll that looks dirty even though it has gone through the normal washing process.
Coca-Cola has switched from green plastic bottles to clear ones for Sprite, Seagrams, Fresca, and Mellow Yellow.
PET stands for polyethylene terephthalate, a type of plastic commonly used for soft drink bottles, water, ketchup, and beer bottles.
PET recycling rates are relatively low, around 20%-25%.
