The Benefits of Adopting Bioplastics for a Greener Planet

Every year, over 400 million tonnes of plastic are produced globally, and the vast majority of it ends up in landfills, oceans, or the natural environment. This mounting plastic crisis – driven by materials made from finite fossil fuels – has pushed scientists, industries, and policymakers to look for smarter alternatives. Bioplastics, made wholly or partly from renewable biological sources like corn starch, sugarcane, or agricultural waste, have emerged as one of the most promising solutions. But what exactly makes them better for the planet? Here’s a closer look at four key advantages of bioplastics and why they matter.

Reducing plastic waste in landfills and the environment
Decreasing greenhouse gas emissions
Conserving fossil fuels
Bioplastics in the circular economy
Composting as a circular pathway
Compatibility with recycling streams
Alignment with global sustainability goals
The bigger picture

Reducing plastic waste in landfills and the environment

One of the most direct benefits of bioplastics is their ability to break down far more quickly than conventional plastics. Traditional petroleum-based plastics can persist in the environment for hundreds of years. According to a 2022 OECD report, around 73% of all plastic waste ends up in landfills, where it accumulates without degrading. Another 4% is mismanaged or ends up as litter in nature.

Biodegradable bioplastics offer a fundamentally different end-of-life scenario. Research published in PeerJ shows that biodegradable bioplastics break down into natural substances, directly reducing the volume of plastic waste that burdens landfills and pollutes ecosystems. Compostable types can be added into organic waste streams and converted into nutrient-rich compost, returning value to the soil rather than sitting inert in a dump.

Certain bioplastics, such as polylactic acid (PLA) and polyhydroxyalkanoates (PHA), degrade within a few years under the right conditions – compared to the centuries it takes for conventional plastics. This property significantly reduces the long-term accumulation of plastic waste in both terrestrial and marine environments. In coastal regions, where plastic litter is a persistent problem, switching to biodegradable bioplastic alternatives could meaningfully reduce pollution over time.

Decreasing greenhouse gas emissions

The production of conventional plastics is heavily tied to greenhouse gas (GHG) emissions. Petroleum extraction, refining, and polymerization all release significant amounts of CO₂ into the atmosphere. According to the OECD, plastics generated 1.8 billion tonnes of GHG emissions in 2019 alone – a figure projected to double by 2060 if current trends continue.

Bioplastics have the potential to significantly cut these emissions. Life cycle assessments (LCAs) comparing bioplastics with traditional plastics have shown that bioplastics can achieve 7.6% to 73.75% lower carbon emissions, depending on the feedstock used and the energy source powering production. Corn-based PLA, for instance, can reduce GHG emissions by up to 25% compared to standard plastics. In more optimistic scenarios using renewable energy for manufacturing, reductions can reach as high as 116%.

The reason bioplastics tend to have a lower carbon footprint comes down to the carbon cycle. When crops like corn or sugarcane grow, they absorb CO₂ from the atmosphere. When a bioplastic made from those crops eventually breaks down or is composted, the CO₂ released is roughly equivalent to what the plant absorbed during growth – making the net addition to the atmosphere much lower than with fossil-based alternatives. European Bioplastics notes that life cycle analyses show biobased plastics can enable significant CO₂ savings, up to carbon neutrality, depending on the specific feedstock and application.

The European Union has recognised this potential. In its Lead Markets Initiative, the EU Commission identified bioplastics as important due to their lower carbon impact, and its 2023 climate policy package targets a minimum 55% reduction in net GHG emissions by 2030 compared to 1990 levels – a goal in which increased use of biobased products is considered a meaningful step.

Conserving fossil fuels

Conventional plastics consume roughly 4% of the world’s total oil production as feedstock, and additional quantities are burned as energy during manufacturing. This dependence on petroleum creates two problems: it depletes a finite and increasingly costly resource, and it ties plastic production to the volatile global oil market.

Bioplastics directly address this by replacing petroleum with renewable plant-based feedstocks. Common feedstocks include corn, sugarcane, cassava, and agricultural by-products such as sugarcane bagasse, corn stover, rice husks, and wheat straw. Because these materials are regrown season after season, they are not subject to the same depletion constraints as oil. Additionally, bioplastic production costs are less susceptible to fluctuations in oil prices compared to conventional plastics – an economic advantage that becomes more significant as fossil fuel markets become more unpredictable.

The shift away from petroleum also matters for energy consumption during production. Bioplastic production generally requires less energy than fossil-based plastic manufacturing, particularly when agricultural waste is used as feedstock rather than food crops. Using second-generation feedstocks – agricultural residues and biological waste materials – further improves the environmental case for bioplastics, as they avoid competition with food production while still reducing fossil fuel use. Research in PMC confirms that bio-based bioplastics using crops or forestry by-products help cut carbon emissions and reduce reliance on fossil fuels simultaneously.

Bioplastics in the circular economy

The circular economy is a model of production and consumption that aims to eliminate waste by keeping materials in use for as long as possible. Traditional plastics sit poorly within this model – globally, only about 10% of conventional plastics are mechanically recycled, while roughly 80% are disposed of with potential environmental leakage. Bioplastics, by contrast, are designed with multiple circular end-of-life pathways in mind.

Composting as a circular pathway

Compostable bioplastics can be redirected into organic waste streams, processed in industrial composting facilities, and converted into compost that returns nutrients to agricultural soils. This diverts material from landfills, conserves landfill space, and allows the nutrients embedded in bioplastic feedstocks to re-enter the food-growing system – a genuinely closed loop. Industrial composting facilities can typically process biodegradable plastics within weeks to a few months, compared to the centuries that conventional plastics persist.

Beyond composting, anaerobic digestion is another end-of-life option for certain bioplastics, where organic material is broken down in the absence of oxygen to generate biogas. This harvested energy can then offset the use of other energy resources, further enhancing the circularity of the system.

Compatibility with recycling streams

Some bio-based plastics are chemically identical or compatible with existing recycling infrastructure. According to a review in Nature Reviews Materials, bio-based plastics can be compatible with existing recycling streams, and certain types offer biodegradation as an additional end-of-life option when recycling is not feasible. Bioplastics that are recyclable can be processed multiple times, helping to balance carbon storage and reduce the overall demand for virgin raw materials.

A circular bioeconomy approach – one that combines higher biomass use with robust recycling – could ultimately turn the plastics sector into a net carbon sink while phasing out landfilling altogether. Research modelling suggests this approach could reduce resource consumption by 30% and achieve 10% greater emission reductions compared to a circular economy model that relies only on recycling without bio-based materials.

Alignment with global sustainability goals

Bioplastics are increasingly aligned with international sustainability frameworks. The United Nations Environment Assembly reached a landmark resolution in 2022 to address plastic pollution through a legally binding international agreement, underscoring the urgency of transitioning to sustainable plastic alternatives. Bioplastics are expected to contribute to the UN Sustainable Development Goals by enabling the use of fewer toxic reagents in production, introducing new recycling and degradation pathways, and driving a measurable shift away from fossil fuels – particularly when integrated into well-designed circular economy systems.

It is worth noting that bioplastics are not a perfect solution. Not all bioplastics are biodegradable, and their environmental benefits depend heavily on proper waste management infrastructure, feedstock choices, and end-of-life handling. Compostable bioplastics, for example, require industrial composting facilities to degrade fully – they do not simply break down in a home garden or a landfill. Ensuring that the infrastructure catches up with the material is a key challenge that governments and industry need to address together.

The bigger picture

Bioplastics represent a meaningful step forward in reducing the environmental footprint of plastic – not just because of what they are made from, but because of what happens to them after use. They reduce the volume of waste piling up in landfills, lower greenhouse gas emissions compared to fossil-based alternatives, cut dependence on finite petroleum resources, and open up new pathways for circular material flows through composting and recycling. The global biodegradable plastics market, valued at roughly one billion USD in 2022, is projected to reach 2.2 billion USD by 2028, reflecting the growing recognition of their potential. As feedstock technology improves and waste management infrastructure develops, the advantages of bioplastics are only set to grow stronger.

What do you think? As bioplastics become more widespread, do you think the responsibility for proper disposal – composting vs. recycling – should fall on consumers, manufacturers, or governments? And considering that not all bioplastics are biodegradable, how should clearer labelling standards be designed so that people can make genuinely informed choices?

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Table of Contents

Reducing plastic waste in landfills and the environment 🔗

Decreasing greenhouse gas emissions 🔗

Conserving fossil fuels 🔗

Bioplastics in the circular economy 🔗

Composting as a circular pathway 🔗

Compatibility with recycling streams 🔗

Alignment with global sustainability goals 🔗

The bigger picture 🔗