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Science & Technology

Scientists just created an enzyme that rapidly breaks down plastic pollution

Scientists just created an enzyme that rapidly breaks down plastic pollution
Photo by Nick Fewings on Unsplash

Last year, we shared the sad impact that plastic pollution has had on some of our planet's most beautiful places. With recycling not turning out to be the savior it was made out to be, solutions to our growing plastic problem can seem distant and complex.

We have seen some glimmers of hope from both human innovation and nature itself, however. In 2016, a bacteria that evolved with the ability to break down plastic was discovered in a Japanese waste site. Two years later, scientists managed to engineer the mutant plastic-eating enzyme they called PETase—named for polyethylene terephthalate, the most common plastic found in bottles and food packaging—in a lab.

Here's an explainer of how those enzymes work:

Ending Plastic Pollution with Designer Bacteriayoutu.be

Now researchers have revealed another game-changer in the plastic-eater—asuper-enzyme that can break down plastic six times faster than PETase alone.


The super-enzyme is a bit of a frankenzyme, created by linking different enzymes together. "When we linked the enzymes, rather unexpectedly, we got a dramatic increase in activity," Prof John McGeehan, at the University of Portsmouth, UK, told The Guardian. "This is a trajectory towards trying to make faster enzymes that are more industrially relevant. But it's also one of those stories about learning from nature, and then bringing it into the lab."

This new research has been published in the journal Proceedings of the National Academy of Sciences.

Combining enzymes could be the key to making various kinds of plastics and combined materials fully recyclable. "There's huge potential," said McGeehan. "We've got several hundred in the lab that we're currently sticking together."

For example, combining the plastic-eating enzymes with existing enzymes that break down natural fibers could allow fabrics made of mixed materials to be recycled, McGeehan told The Guardian. "Mixed fabrics [of polyester and cotton] are really tricky to recycle. We've been speaking to some of the big fashion companies that produce these textiles, because they're really struggling at the moment."

This newest research isn't the first to improve upon the plastic-eating bacteria discovery. In April, a French chemistry company called Carbios shared their own mutant enzyme that can degrade 90% of plastic bottles within 10 hours. However, that enzyme, which originally discovered in a pile of composting leaves, requires heating above 70 degrees Celsius (nearly 160 degrees Fahrenheit), whereas this new super-enzyme works at room temperature.

Not that it's a cutthroat competition. We are talking about helping out the entire planet and saving life as we know it, after all. McGeehan suggested that the researchers work together with the private sector to get the enzymes working out in the real world. "If we can make better, faster enzymes by linking them together and provide them to companies like Carbios, and work in partnership, we could start doing this within the next year or two," McGeehan told The Guardian.

McGeehan did emphasize to CNN that the super-enzyme is "still way too slow" to be commercially viable at this point, but it is a huge step in the process. "We were actually quite surprised it worked so well," he told CNN.

Here's to science coming up with solutions to the problems human scientific advances have created, and here's to learning to live in better balance with nature in the process.

Identity

Celebrate International Women's Day with these stunning photos of female leaders changing the world

The portraits, taken by acclaimed photographer Nigel Barker, are part of CARE's "She Leads the World" campaign.

Images provided by CARE

Kadiatu (left), Zainab (right)

True

Women are breaking down barriers every day. They are transforming the world into a more equitable place with every scientific discovery, athletic feat, social justice reform, artistic endeavor, leadership role, and community outreach project.

And while these breakthroughs are happening all the time, International Women’s Day (Mar 8) is when we can all take time to acknowledge the collective progress, and celebrate how “She Leads the World.

This year, CARE, a leading global humanitarian organization dedicated to empowering women and girls, is celebrating International Women’s Day through the power of portraiture. CARE partnered with high-profile photographer Nigel Barker, best known for his work on “America’s Next Top Model,” to capture breathtaking images of seven remarkable women who have prevailed over countless obstacles to become leaders within their communities.

“Mabinty, Isatu, Adama, and Kadiatu represent so many women around the world overcoming incredible obstacles to lead their communities,” said Michelle Nunn, President and CEO of CARE USA.

Barker’s bold portraits, as part of CARE’s “She Leads The World” campaign, not only elevate each woman’s story, but also shine a spotlight on how CARE programs helped them get to where they are today.

About the women:

Mabinty

international womens day, care.org

Mabinty is a businesswoman and a member of a CARE savings circle along with a group of other women. She buys and sells groundnuts, rice, and fuel. She and her husband have created such a successful enterprise that Mabinty volunteers her time as a teacher in the local school. She was the first woman to teach there, prompting a second woman to do so. Her fellow teachers and students look up to Mabinty as the leader and educator she is.

Kadiatu

international womens day, care.org

Kadiatu supports herself through a small business selling food. She also volunteers at a health clinic in the neighboring village where she is a nursing student. She tests for malaria, works with infants, and joins her fellow staff in dancing and singing with the women who visit the clinic. She aspires to become a full-time nurse so she can treat and cure people. Today, she leads by example and with ambition.

Isatu

international womens day, care.org

When Isatu was three months pregnant, her husband left her, seeking his fortune in the gold mines. Now Isatu makes her own way, buying and selling food to support her four children. It is a struggle, but Isatu is determined to be a part of her community and a provider for her kids. A single mother of four is nothing if not a leader.

Zainab

international womens day, care.org

Zainab is the Nurse in Charge at the Maternal Child Health Outpost in her community. She is the only nurse in the surrounding area, and so she is responsible for the pre-natal health of the community’s mothers-to-be and for the safe delivery of their babies. In a country with one of the world’s worst maternal death rates, Zainab has not lost a single mother. The community rallies around Zainab and the work she does. She describes the women who visit the clinic as sisters. That feeling is clearly mutual.

Adama

international womens day, care.org

Adama is something few women are - a kehkeh driver. A kehkeh is a three-wheeled motorcycle taxi, known elsewhere as a tuktuk. Working in the Kissy neighborhood of Freetown, Adama is the primary breadwinner for her family, including her son. She keeps her riders safe in other ways, too, by selling condoms. With HIV threatening to increase its spread, this is a vital service to the community.

Ya Yaebo

international womens day, care.org

“Ya” is a term of respect for older, accomplished women. Ya Yaebo has earned that title as head of her local farmers group. But there is much more than that. She started as a Village Savings and Loan Association member and began putting money into her business. There is the groundnut farm, her team buys and sells rice, and own their own oil processing machine. They even supply seeds to the Ministry of Agriculture. She has used her success to the benefit of people in need in her community and is a vocal advocate for educating girls, not having gone beyond grade seven herself.

On Monday, March 4, CARE will host an exhibition of photography in New York City featuring these portraits, kicking off the multi-day “She Leads the World Campaign.

Learn more, view the portraits, and join CARE’s International Women's Day "She Leads the World" celebration at CARE.org/sheleads.


Health

Over or under? Surprisingly, there actually is a 'correct' way to hang a toilet paper roll.

Let's settle this silly-but-surprisingly-heated debate once and for all.

Elya/Wikimedia Commons

Should you hang the toilet paper roll over or under?



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Humans have debated things large and small over the millennia, from the democracy to breastfeeding in public to how often people ought to wash their sheets.

But perhaps the most silly-yet-surprisingly-heated household debate is the one in which we argue over which way to hang the toilet paper roll.

The "over or under" question has plagued marriages and casual acquaintances alike for over 100 years, with both sides convinced they have the soundest reasoning for putting their toilet paper loose end out or loose end under. Some people feel so strongly about right vs. wrong TP hanging that they will even flip the roll over when they go to the bathroom in the homes of strangers.

Contrary to popular belief, it's not merely an inconsequential preference. There is actually a "correct" way to hang toilet paper, according to health experts as well as the man who invented the toilet paper roll in the first place.

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Family

A recently-deceased mom became a celebrity after her kids' published stunningly clever obituary

“I finally have the smoking hot body I have always wanted… having been cremated.”

The Hamilton Spectator

RIP Sybil Marie Hicks

It's said that everyone dies twice. The first is your physical death, the second is the last time anyone utters your name.

Sybil Marie Hicks, from Baysville, Ontario, died on February 2, at the age of 81, but it'll be a long time before her name is forgotten. Her children have turned her into a posthumous celebrity after writing a hilarious first-person obituary for her that was published in The Hamilton Spectator on February 5, 2019.

According to her daughter, it was fitting tribute.

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Brielle Asero lost her job after 2 months.

TikTokker Brielle Asero, 21, a recent college graduate, went viral on TikTok in October for her emotional reaction to the first day at a 9-to-5 job. The video, which received 3.4 million views, captured the public’s attention because it was like a cultural Rorschach test.

Some who saw the video thought that Asero came off as entitled and exemplified the younger generation’s lack of work ethic. In contrast, others sympathized with the young woman who is just beginning to understand how hard it is to find work-life balance in modern-day America.

“I’m so upset,” she says in the video. "I get on the train at 7:30 a.m., and I don't get home until 6:15 p.m. [at the] earliest. I don't have time to do anything!" Asero said in a video.

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Gordon Ramsay at play... work.


Gordon Ramsay is not exactly known for being nice.

Or patient.

Or nurturing.

On his competition show "Hell's Kitchen," he belittles cooks who can't keep up. If people come to him with their problems, he berates them. If someone is struggling to get something right in the kitchen, he curses them out.

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Family

I told a kid a riddle my dad told me when I was 7. His answer proves how far we've come.

This classic riddle takes on new meaning as our world changes for the better.




When I was 7, my dad told me a riddle.

"A man and his son are driving in their car when they are hit by a tractor-trailer.

Photo via iStock.

(We were driving at the time, so of course this was the riddle he decided to tell.)

The father dies instantly.

The son is badly injured. Paramedics rush him to the hospital.

Photo via iStock.

As he is being wheeled into the operating room, the surgeon takes one look the boy and says:

'I can't operate on him. He's my son.'

How is that possible?!"

Without missing a beat, I answered:

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Know the signs of a domestic abuser.

Most abusers don't start their relationships by hitting their partners. That's why early warning signs are vital to recognize.

I know two women who recently left abusive partners. Both men seemed sweet and likable—even gentle—each time I saw them. Both had some lovely qualities as people and even as partners. And both turned out to be controlling, increasingly abusive partners behind closed doors.


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