Here’s How Carbon Dioxide Can be Used to Make Biodegradable Plastics
Carbon dioxide and plastic pollution are two of the most pressing environmental crises of our time. Rising CO₂ emissions continue to fuel global climate change, while plastic waste piles up in landfills and oceans, persisting for centuries. Both problems share a common root: fossil fuels. Conventional plastics are made from petroleum, contributing to greenhouse gas emissions during production and creating long-term pollution after disposal. Scientists and innovators, however, are now finding a way to tackle both issues simultaneously by turning waste CO₂ into biodegradable plastics.
This new approach uses carbon dioxide, one of the most abundant greenhouse gases, as a raw material to create a family of biodegradable polymers, including Polypropylene Carbonate (PPC). The idea is as elegant as it is practical: capture CO₂ that would otherwise be released into the atmosphere and chemically transform it into useful, environmentally friendly materials. The result is a “double win” for the planet—reducing greenhouse gas emissions while producing plastics that can safely break down at the end of their life cycle.
Turning CO₂ into something valuable is no small feat. The molecule itself is incredibly stable, which means it doesn’t easily react with other substances. For decades, scientists have been searching for efficient ways to “fix” carbon dioxide into useful compounds. Recent breakthroughs in chemistry have made this possible through the use of specialized catalysts, substances that accelerate chemical reactions without being consumed. Many of these catalysts are based on metals like copper or zinc, or on complex organometallic compounds.
When CO₂ is combined with other chemicals such as epoxides or sugars under the right conditions, these catalysts enable the formation of polymer chains—long molecules that make up plastics. The resulting materials are typically polycarbonates or polyols, which can then be used to produce biodegradable plastics, polyurethane foams, coatings, and packaging materials. What makes these new plastics remarkable is that they are chemically distinct from conventional, petroleum-based plastics. They are engineered to decompose under certain microbial or composting conditions, leaving behind only water and carbon dioxide.
The environmental implications of this technology are profound. First, by embedding captured CO₂ into plastic products, manufacturers effectively lock carbon away, preventing it from entering the atmosphere. Companies like Newlight Technologies, with its AirCarbon product, and Covestro, a major player in polymer science, are already commercializing these materials. AirCarbon, for example, is used in packaging, wallets, and eyewear frames, all made from CO₂ and methane captured from natural sources like farms and landfills.
Second, the biodegradability of these plastics addresses one of the most persistent flaws in modern materials: their longevity. Traditional plastics can remain intact for hundreds of years, breaking down into harmful microplastics that infiltrate ecosystems and food chains. In contrast, CO₂-based bioplastics are designed to return to nature in a safe, circular process. Under the right conditions, such as in industrial composting facilities, they break down into harmless components, closing the loop on waste.
Another advantage lies in reducing dependence on fossil fuels. By using captured CO₂ as a key ingredient, manufacturers replace a portion of petroleum-derived feedstocks. This shift could significantly reduce emissions from both raw material extraction and plastic production, moving the industry closer to a low-carbon, circular economy.
Despite the promise, challenges remain. While the global bioplastics market is expanding rapidly—European Bioplastics projects that production capacity will more than double over the next five years—CO₂-based plastics still account for a small share of total output. One major barrier is cost. Producing these materials remains more expensive than making conventional plastics like polyethylene or polypropylene, which benefit from decades of industrial scaling and cheap fossil inputs. Achieving cost parity will require larger-scale operations, further research, and supportive government policies.
Still, momentum is growing. Companies such as Novomer (now part of Danimer Scientific), Covestro, and Fortum Recycling & Waste are investing heavily in commercial-scale production. Fortum, for instance, is exploring ways to capture CO₂ directly from waste incineration plants to produce biodegradable materials. As production expands and technologies mature, experts predict that prices will drop, making CO₂-derived plastics more competitive.
The future potential is vast. Beyond packaging and foams, researchers envision these materials being used in automotive parts, construction panels, textiles, and everyday consumer goods. If scaled effectively, this technology could help decouple the plastic economy entirely from fossil fuels, reducing pollution from both carbon emissions and persistent waste.
