How a bacterium may help solve the plastic pollution crisis

Plastic pollution is one of the most pressing environmental issues of our time. The accumulation of petroleum-based plastics is having devastating effects on our environment, wildlife and human health. In a recent study published in Scientific Reports, researchers from Nara Institute of Science and Technology revealed a bacterium that is not only able to degrade difficult-to-recycle petroleum-based plastics but can also sustainably produce more environmentally friendly biodegradable plastics.

Petroleum-based plastics, including poly(ethylene terephthalate) (PET), are extensively used in everyday products, such as single-use plastic bottles, textiles and food wrappers. While such products are disposed of rapidly after use, they persist in the environment for hundreds of years. The plastic pollution resulting from our throw-away culture has now exceeded manageable levels and is overwhelming the planet’s ability to deal with it. The environmental impacts are becoming increasingly obvious, with wildlife and human health increasingly threatened.

This finding is particularly promising because it addresses two current problems for the sustainability of plastics: degrading the most persistent form of petroleum-based plastic while sustainably producing biodegradable plastics.

"We believe that this discovery could be significant in tackling plastic pollution," Yoshida states, "as we show that the PET-degradation and PHB-synthesis pathways are functionally linked in I. sakaiensis. This might provide a novel pathway where a single bacterial species breaks down difficult-to-recycle PET plastics and uses the products to make biodegradable PHA plastics."

Given the overwhelming challenge of dealing with worldwide plastic pollution, this novel bacterial approach may be a significant part of the solution.