Speaker 1: Welcome to brain Stuff from How Stuff Works, Hey, brain Stuff,
Speaker 1: Lauren Vogel bomb here. One of the amazing things about
Speaker 1: our universe is that nothing really goes to waste. For instance,
Speaker 1: you the incredible master work that you are happened to
Speaker 1: be composed of the trash that exploded out of a supernova.
Speaker 1: In every nook and cranny of the cosmos, the universe
Speaker 1: is reorganizing and reusing. It is the great recycler. Our
Speaker 1: planet recycles everything, water, carbon, nutrients of all kinds. So
Speaker 1: it stands to reason that we'd be really good at
Speaker 1: recycling stuff here on Earth. But we humans are only
Speaker 1: so so recyclers. Take plastic. We do a great job
Speaker 1: of digging up ancient deposits of carbon in order to
Speaker 1: make the stuff, which is recycling sort of. But since
Speaker 1: the nineteen forties, we've manufactured mind boggling amounts of a
Speaker 1: material that will likely hang out in the environment for centuries,
Speaker 1: kill wildlife and leaching toxic chemicals. Only about ten percent
Speaker 1: of that is ever recycled. But in a Japanese research
Speaker 1: team discovered bacteria making some inroads into plastics recycling where
Speaker 1: we humans were failing. Poly Ethylene tariff thalate or PET
Speaker 1: plastics are everywhere, most notably in plastic soda and water bottles,
Speaker 1: and the bonds that hold its molecules together are very strong.
Speaker 1: So it was something of a surprise when a colony
Speaker 1: of these bacteria were discovered in a Japanese landfill. But
Speaker 1: what's their secret? In a issue of the journal Proceedings
Speaker 1: of the National Academy of Sciences, and International Group of
Speaker 1: Researchers reported on the PET busting enzyme produced by these bacteria.
Speaker 1: Not only did they map the structure of the enzyme,
Speaker 1: but in the process of studying and tinkering with it,
Speaker 1: they also made it faster. Turns out, it was all
Speaker 1: a bit of an accident. Lead author Greg Beckham, senior
Speaker 1: engineer at the National Renewable Energy Laboratory, said in a
Speaker 1: press release. We hoped to determine its structure to aid
Speaker 1: in protein engineering, but we ended up going a step
Speaker 1: further and accidentally engineered an enzyme with improved performance at
Speaker 1: breaking down these plastics. What we've learned is that p
Speaker 1: E T A S is not yet fully optimized to
Speaker 1: degrade PET, and now that we've shown this, it's time
Speaker 1: to apply the tools of protein engineering and evolution to
Speaker 1: continue to improve it. The goal of this research is
Speaker 1: to find a way to create an enzyme that works
Speaker 1: fast enough to break down huge amounts of pet plastic
Speaker 1: into its component parts so it can be turned back
Speaker 1: into plastic bottles. One possible solution is to plant this
Speaker 1: mutant enzyme into bacteria that can withstand insanely high temperatures,
Speaker 1: which might break the plastic down ten to a hundred
Speaker 1: times quicker. Whatever it takes, y'all, we humans buy one
Speaker 1: million plastic bottles every minute. Reduce and recycle your plastic waste.
Speaker 1: But it also can't hurt to keep your fingers crossed
Speaker 1: for these bacteria to work out. Today's episode was written
Speaker 1: by Jesselyn Shields and produced by Tyler Clang. For more
Speaker 1: on this and lots of other environmental topics, visit our
Speaker 1: home planet, how stuff Works dot com.