(Not actual size - they're probably bigger.) Some good news for the planet this week, in the battle against plastic waste. There’s an enzyme that chomps up PET, the plastic used in bottles. Left to it’s own devices, the plastic takes hundreds of years to break down. The creatively monikered PETase enzyme starts breaking it down in a handful of days. All good so far, then. Nasty plastics feed some friendly enzymes. Win-win, right? Not quite – it gets a bit creepy when you look into it. Ideonella sakaiensis is a bacterium that consumes PET. Like something out of a sci-fi film, it was discovered quietly scoffing plastic at a bottle recycling plant in Japan. Our friendly bacterium uses the enzyme as part of the snacking process. Bit weird, but fine. It seems that some plants do have a protective layer made up of something vaguely similar to polyethylene, so it’s evolved from that. Pretty damn quickly, as we’ve only been turning out plastics at scale for half a century. A ra...
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