Bottlenecks in biobased approaches to plastic degradation

Plastic waste is an environmental challenge, but also presents a biotechnological opportunity as a unique carbon substrate. With modern biotechnological tools, it is possible to enable both recycling and upcycling. To realize a plastics bioeconomy, significant intrinsic barriers must be overcome using a combination of enzyme, strain, and process engineering. This article highlights advances, challenges, and opportunities for a variety of common plastics. The way we generate and treat plastic waste is a key consideration in the transition from a take-make-waste model to a truly circular economy. Here, authors discuss their views on how biotechnology could contribute to solving the plastic problem, and the barriers we need to overcome to make such approaches a reality.