11/08/2026
Deep in the Amazon, tangled among tree roots, lives an organism that treats plastic the same way most fungi treat a fallen log, as dinner. This is Pestalotiopsis microspora, a fungus discovered growing quietly inside plant tissue in Ecuador's rainforest, and it has a genuine appetite for polyurethane, one of the toughest, most stubborn plastics humans have ever made.
Researchers from Yale first found it during a student expedition into Yasuni National Park, isolating the fungus from stems and leaves where it lives as an endophyte, meaning it spends its life inside plants without harming them. When they tested it in the lab, they discovered something remarkable: the fungus could survive on polyurethane as its only food source, breaking down chemical bonds that normally take centuries to weaken.
What makes this fungus especially valuable is that it can do this trick without oxygen. Most landfill waste sits buried deep underground in airless conditions, exactly the kind of environment where plastic tends to just sit and persist essentially forever. While other plastic degrading organisms slow down or stop entirely without air, this fungus keeps working at full strength, secreting enzymes that snip apart the plastic's polymer chains and convert the fragments into simple compounds it can absorb as fuel.
To put the scale of the problem in perspective, the world produces well over 400 million tons of plastic every year, and less than a tenth of that gets recycled. The rest lingers in landfills or the environment for generations. A fungus that can chew through that kind of waste, even in the airless dark, hints at a future where biology does cleanup work that chemistry alone has struggled to solve.
Scientists are still working to figure out how to scale this from lab dish to landfill, but the discovery itself has become one of the more hopeful data points in the fight against plastic pollution.
Do you think nature will end up solving the plastic crisis before humans do?
Source: Yale University, Applied and Environmental Microbiology