[The Microscopic Solution: Can Bacteria Help Solve the Ocean Plastic Crisis?]-[WeWow Earth Week 2024 - Day 2 (4/23/24)]

Wow in the World · B1 · 2024-04-23

📋 Summary

The Microscopic Solution: Can Bacteria Help Solve the Ocean Plastic Crisis?

In a recent episode of Wow in the World, hosts Mindy Thomas and Guy Raz explore a fascinating intersection of environmental science and microbiology: the discovery of plastic-eating bacteria. While Mindy introduces her new "microscopic pets," the conversation pivots toward a serious scientific inquiry regarding the state of our oceans.

The Discovery of Rhodococcus ruber

Mindy presents her new pets, a species of bacteria scientifically known as Rhodococcus ruber. These microbes are invisible to the naked eye, measuring only about two microns across—roughly 30 times smaller than the width of a human hair. Despite their size, these organisms possess a remarkable biological capability: they can consume plastic. When exposed to ultraviolet light from the sun, plastic breaks down into tiny, bite-sized chunks that Rhodococcus ruber can ingest.

The Science of "Tooting" Plastic

According to research from the Royal Netherlands Institute for Sea Research, these bacteria don't just eat plastic; they metabolize it. Through a process jokingly referred to by Mindy as "tooting," the bacteria break down the plastic polymers and convert them into carbon dioxide (CO2). Calculations suggest that these microbes might be responsible for processing up to 1% of the plastic currently floating in our oceans. While 1% may seem like a modest figure, in the context of the 24.4 trillion pieces of plastic currently polluting our marine ecosystems, it represents a significant natural phenomenon.

Solving the Ocean Plastic Mystery

Guy Raz highlights a major scientific mystery: the discrepancy between the amount of plastic humans dump into the ocean and the amount scientists actually find floating there. The Great Pacific Garbage Patch alone contains approximately 18 trillion pieces of plastic, weighing roughly 578,000 tons—equivalent to the weight of 825 African elephants. The existence of plastic-eating bacteria like Rhodococcus ruber provides a potential explanation for why there is less plastic than expected, suggesting that nature has begun to adapt to human-made pollution.

The Limitations of Biological Solutions

While Mindy initially suggests a "bonker balls" idea of breeding billions of these bacteria to consume all ocean plastic, Guy Raz provides a grounded perspective. He emphasizes that relying solely on microbes is not a panacea. The most effective way to combat ocean pollution remains the reduction of waste at the source. "One of the best ways to stop plastic polluting our waters is to make sure that it never gets there in the first place, by either recycling or reusing the plastic that we already have," Guy Raz notes.

Conclusion

The episode serves as both an educational deep dive into microbiology and a call to environmental responsibility. While the discovery of Rhodococcus ruber offers a glimmer of hope and a fascinating look at how life finds a way to adapt to human impact, the hosts reinforce that human intervention—specifically through recycling and upcycling—remains the primary tool in preserving our planet. As Mindy and Reggie demonstrate through their own efforts in the basement, turning "nasty old garbage" into "new useful things" is a practice that everyone should adopt to protect the Earth.

🎯Key Sentences

I wonder what kind of candy he's eating.

I did find his compost bin, but it was full of worms, so I ran away screaming.

Classic mistake.

Happens way more often than you think.

I'm not going to come up with names for every single one of them.

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📖 Transcript

Grownups, Wondery Plus subscribers can listen to Wow in the World early and ad-free right now.

Join Wondery Plus in the Wondery app or Wondery Kids Plus on Apple Podcasts.

Hey, Wowzer fans, Mindy here.

And before we start the show, I gotta let you know that this November, with a special new episode featuring our friends at Circle Round and Terrestrials on Radiolab for Kids,

And don't miss when Elmo from Sesame Street stops by Wow in the World to make us all belly laugh on November 24th.

Oh, but that's not all, Reg.

Or study on the web version →