With the organization’s technology, an area of the ocean the size of a football field is being cleaned every five seconds.
When self-described “ocean custodian” Boyan Slat took the stage at TED 2025 in Vancouver this week, he showed viewers a reality many of us are already heartbreakingly familiar with: There is a lot of trash in the ocean.
“If we allow current trends to continue, the amount of plastic that’s entering the ocean is actually set to double by 2060,” Slat said in his TED Talk, which will be published online at a later date.
Plus, once plastic is in the ocean, it accumulates in “giant circular currents” called gyres, which Slat said operate a lot like the drain of the bathtub, meaning that plastic can enter these currents but cannot leave.
That’s how we get enormous build-ups like the Great Pacific Garbage Patch, a giant collection of plastic pollution in the ocean that is roughly twice the size of Texas.
As the founder and CEO of The Ocean Cleanup, Slat’s goal is to return our oceans to their original, clean state before 2040. To accomplish this, two things must be done.
First: Stop more plastic from entering the ocean. Second: Clean up the “legacy” pollution that is already out there and doesn’t go away by itself.
And Slat is well on his way.
Pictured: Kingston Harbour in Jamaica. Photo courtesy of The Ocean Cleanup Project
When Slat’s first TEDx Talk went viral in 2012, he was able to organize research teams to create the first-ever map of the Great Pacific Garbage Patch. From there, they created a technology to collect plastic from the most garbage-heavy areas in the ocean.
“We imagined a very long, u-shaped barrier … that would be pushed by wind and waves,” Slat explained in his Talk.
This barrier would act as a funnel to collect garbage and be emptied out for recycling.
But there was a problem.
“We took it out in the ocean, and deployed it, and it didn’t collect plastic,” Slat said, “which is a pretty important requirement for an ocean cleanup system.”
Soon after, this first system broke into two. But a few days later, his team was already back to the drawing board.
From here, they added vessels that would tow the system forward, allowing it to sweep a larger area and move more methodically through the water. Mesh attached to the barrier would gather plastic and guide it to a retention area, where it would be extracted and loaded onto a ship for sorting, processing, and recycling.
It worked.
“For 60 years, humanity had been putting plastic into the ocean, but from that day onwards, we were also taking it back out again,” Slat said, with a video of the technology in action playing on screen behind him.
To applause, he said: “It’s the most beautiful thing I’ve ever seen, honestly.”
Over the years, Ocean Cleanup has scaled up this cleanup barrier, now measuring almost 2.5 kilometers — or about 1.5 miles — in length. And it cleans up an area of the ocean the size of a football field every five seconds.
Pictured: The Ocean Cleanup's System 002 deployed in the Great Pacific Garbage Patch. Photo courtesy of The Ocean Cleanup
The system is designed to be safe for marine life, and once plastic is brought to land, it is recycled into new products, like sunglasses, accessories for electric vehicles, and even Coldplay’s latest vinyl record, according to Slat.
These products fund the continuation of the cleanup. The next step of the project is to use drones to target areas of the ocean that have the highest plastic concentration.
In September 2024, Ocean Cleanup predicted the Patch would be cleaned up within 10 years.
However, on April 8, Slat estimated “that this fleet of systems can clean up the Great Pacific Garbage Patch in as little as five years’ time.”
With ongoing support from MCS, a Netherlands-based Nokia company, Ocean Cleanup can quickly scale its reliable, real-time data and video communication to best target the problem.
It’s the largest ocean cleanup in history.
But what about the plastic pollution coming into the ocean through rivers across the world? Ocean Cleanup is working on that, too.
To study plastic pollution in other waterways, Ocean Cleanup attached AI cameras to bridges, measuring the flow of trash in dozens of rivers around the world, creating the first global model to predict where plastic is entering oceans.
“We discovered: Just 1% of the world’s rivers are responsible for about 80% of the plastic entering our oceans,” Slat said.
His team found that coastal cities in middle-income countries were primarily responsible, as people living in these areas have enough wealth to buy things packaged in plastic, but governments can’t afford robust waste management infrastructure.
Ocean Cleanup now tackles those 1% of rivers to capture the plastic before it reaches oceans.
Pictured: Interceptor 007 in Los Angeles. Photo courtesy of The Ocean Cleanup
“It’s not a replacement for the slow but important work that’s being done to fix a broken system upstream,” Slat said. “But we believe that tackling this 1% of rivers provides us with the only way to rapidly close the gap.”
To clean up plastic waste in rivers, Ocean Cleanup has implemented technology called “interceptors,” which include solar-powered trash collectors and mobile systems in eight countries worldwide.
In Guatemala, an interceptor captured 1.4 million kilograms (or over 3 million pounds) of trash in under two hours. Now, this kind of collection happens up to three times a week.
“All of that would have ended up in the sea,” Slat said.
Now, interceptors are being brought to 30 cities around the world, targeting waterways that bring the most trash into our oceans. GPS trackers also mimic the flow of the plastic to help strategically deploy the systems for the most impact.
“We can already stop up to one-third of all the plastic entering our oceans once these are deployed,” Slat said.
And as soon as he finished his Talk on the TED stage, Slat was told that TED’s Audacious Project would be funding the deployment of Ocean Cleanup’s efforts in those 30 cities as part of the organization’s next cohort of grantees.
While it is unclear how much support Ocean Cleanup will receive from the Audacious Project, Head of TED Chris Anderson told Slat: “We’re inspired. We’re determined in this community to raise the money you need to make that 30-city project happen.”
And Slat himself is determined to clean the oceans for good.
“For humanity to thrive, we need to be optimistic about the future,” Slat said, closing out his Talk.
“Once the oceans are clean again, it can be this example of how, through hard work and ingenuity, we can solve the big problems of our time.”
The "Marx hated Jews" thing comes from the fact that he wrote an essay titled "On The Jewish Question."
That phrasing raises alarm bells because we associate the term "The Jewish Question" with Nazis, but it was just the way issues like this were phrased within these philosophical circles. And honestly even beyond that it's more of a translation convention than anything else. You could just as easily have translated that title as "Regarding the Matter of Jews."
The essay is actually a response to another philosopher named Bauer, who claimed that Jews would only be liberated if they stopped being Jewish, because true emancipation requires secularism. The essays Marx is responding to are blatantly antisemitic, even by late-19th century standards. Bauer was arguing that Jews who wanted liberation from oppression were basically asking for "special privileges," (in an argument that bears some similarity to modern concepts of "reverse racism") and implying that Jews aren't even oppressed because they control the economy.
Marx's "On The Jewish Question" is basically him saying Bauer is dumb and wrong and antisemitic, and he's being deeply sarcastic for most of the essay.
He does so by throwing Bauer's antisemitism back in his face, by using a series of antisemitic arguments about how the real religion of the Jew is money and huckstering, and so if you want to abolish Judaism, you'd have to abolish economic exploitation. He's responding directly to Bauer's use of antisemitic tropes about how Jews control the economy. He's using Bauer's own antisemitic framework to prove Bauer wrong.
This also goes back to the conflict between Marx and the rest of the Young Hegelians (which Bauer was). He was constantly criticizing them for being too idealistic and abstract, rather than focusing on material realities. His argument here was "You're framing 'the Jewish Question' as if it's a theological problem, but it's not. It's a political and economic one." Because he was Karl Marx and that was his whole thing.
I really don't understand how anyone reads this essay as anything but sarcasm. I get that some of it is probably lost in translation, but the context makes it really clear that Marx is making fun of Bauer. The idea of Jews giving up their religion would have been deeply personal to Marx. He would have understood exactly what it meant for Jews to give up their religion, and how that was an act of oppression rather than liberation from it. Also, Marx and Bauer had already split by the time this essay was written, and they kind of hated each other. Marx wrote a lot of responses to/criticisms of Bauer, and he called Bauer a "right wing fanatic" multiple times.
Like, what's actually more likely here?
Option 1: Karl Marx, a Jewish man, wrote one essay that is totally at odds with all his other analysis on the nature of oppression to be rabidly antisemitic and then basically never discussed the subject again?
Option 2: Karl Marx, a Jewish man and a well-known lover of pettiness and drama, wrote an incredibly sarcastic essay making fun of a raging antisemite that he already he didn't like?
I like this addition. Funny how capitalism, antisemitism and right to exist just hasn’t changed in the last 200 years since this German economist’s time.
Metuktire, in the Indigenous Capoto-Jarina territory in Brazil’s Amazon rainforest, is a pocket of resistance against mining, which has deva
The Capoto-Jarina territory has been recognised and protected by the Brazilian government since 1984. Metuktire is a symbol not only of resilience but also adaptation, with the community’s solar panels reflecting their commitment to sustainable energy
Metuktire is a village of 400 people in the Capoto-Jarina’s near-pristine forest. The village has been protected largely thanks to its chief, Raoni Metutkire, an environmentalist who has gained international recognition. Thought to be in his 90s, Raoni lived here for a long time but now, for health reasons, lives in Peixoto de Azevedo, where he continues to advocate for his people with politicians
The villagers have growing concerns about the impact of the climate crisis on their future. Cacique Pekan Metuktire, right, speaks to Kubenpari at his home. ‘Last year, there was a massive fire that we could not control,’ he says. ‘When I was young, the climate was normal in this village. Now, the sun scorches, the earth dries up and the rivers overflow. If this continues, it will be the end of our world’
The universe never tells us if we did right or wrong. It’s more important to try to help people than to know that you did. More important that someone else’s life gets better than for you to feel good about yourself. You never know the effect you might have on someone, not really. Maybe one core thing you said haunts them forever. Maybe one moment of kindness gives them comfort or courage. Maybe you said the one thing they needed to hear. It doesn’t matter if you ever know, you just have to try.
With “green corridors” that mimic the natural forest, the Colombian city is driving down temperatures -- and could become five degrees coole
"With “green corridors” that mimic the natural forest, the Colombian city is driving down temperatures — and could become five degrees cooler over the next few decades.
In the face of a rapidly heating planet, the City of Eternal Spring — nicknamed so thanks to its year-round temperate climate — has found a way to keep its cool.
Previously, Medellín had undergone years of rapid urban expansion, which led to a severe urban heat island effect — raising temperatures in the city to significantly higher than in the surrounding suburban and rural areas. Roads and other concrete infrastructure absorb and maintain the sun’s heat for much longer than green infrastructure.
“Medellín grew at the expense of green spaces and vegetation,” says Pilar Vargas, a forest engineer working for City Hall. “We built and built and built. There wasn’t a lot of thought about the impact on the climate. It became obvious that had to change.”
Efforts began in 2016 under Medellín’s then mayor, Federico Gutiérrez (who, after completing one term in 2019, was re-elected at the end of 2023). The city launched a new approach to its urban development — one that focused on people and plants.
The $16.3 million initiative led to the creation of 30 Green Corridors along the city’s roads and waterways, improving or producing more than 70 hectares of green space, which includes 20 kilometers of shaded routes with cycle lanes and pedestrian paths.
These plant and tree-filled spaces — which connect all sorts of green areas such as the curb strips, squares, parks, vertical gardens, sidewalks, and even some of the seven hills that surround the city — produce fresh, cooling air in the face of urban heat. The corridors are also designed to mimic a natural forest with levels of low, medium and high plants, including native and tropical plants, bamboo grasses and palm trees.
Heat-trapping infrastructure like metro stations and bridges has also been greened as part of the project and government buildings have been adorned with green roofs and vertical gardens to beat the heat. The first of those was installed at Medellín’s City Hall, where nearly 100,000 plants and 12 species span the 1,810 square meter surface.
“It’s like urban acupuncture,” says Paula Zapata, advisor for Medellín at C40 Cities, a global network of about 100 of the world’s leading mayors. “The city is making these small interventions that together act to make a big impact.”
At the launch of the project, 120,000 individual plants and 12,500 trees were added to roads and parks across the city. By 2021, the figure had reached 2.5 million plants and 880,000 trees. Each has been carefully chosen to maximize their impact.
“The technical team thought a lot about the species used. They selected endemic ones that have a functional use,” explains Zapata.
The 72 species of plants and trees selected provide food for wildlife, help biodiversity to spread and fight air pollution. A study, for example, identified Mangifera indica as the best among six plant species found in Medellín at absorbing PM2.5 pollution — particulate matter that can cause asthma, bronchitis and heart disease — and surviving in polluted areas due to its “biochemical and biological mechanisms.”
And the urban planting continues to this day.
The groundwork is carried out by 150 citizen-gardeners like Pineda, who come from disadvantaged and minority backgrounds, with the support of 15 specialized forest engineers. Pineda is now the leader of a team of seven other gardeners who attend to corridors all across the city, shifting depending on the current priorities...
“I’m completely in favor of the corridors,” says [Victoria Perez, another citizen-gardener], who grew up in a poor suburb in the city of 2.5 million people. “It really improves the quality of life here.”
Wilmar Jesus, a 48-year-old Afro-Colombian farmer on his first day of the job, is pleased about the project’s possibilities for his own future. “I want to learn more and become better,” he says. “This gives me the opportunity to advance myself.”
The project’s wider impacts are like a breath of fresh air. Medellín’s temperatures fell by 2°C in the first three years of the program, and officials expect a further decrease of 4 to 5C over the next few decades, even taking into account climate change. In turn, City Hall says this will minimize the need for energy-intensive air conditioning...
In addition, the project has had a significant impact on air pollution. Between 2016 and 2019, the level of PM2.5 fell significantly, and in turn the city’s morbidity rate from acute respiratory infections decreased from 159.8 to 95.3 per 1,000 people [Note: That means the city's rate of people getting sick with lung/throat/respiratory infections.]
There’s also been a 34.6 percent rise in cycling in the city, likely due to the new bike paths built for the project, and biodiversity studies show that wildlife is coming back — one sample of five Green Corridors identified 30 different species of butterfly.
Other cities are already taking note. Bogotá and Barranquilla have adopted similar plans, among other Colombian cities, and last year São Paulo, Brazil, the largest city in South America, began expanding its corridors after launching them in 2022.
“For sure, Green Corridors could work in many other places,” says Zapata."
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