Nov 8, 2023 · 37m · american-optimist
Ep 69: How a Teenager Set Out to Rid the Ocean of Plastic; Boyan Slat & the Ocean Cleanup · Joe Lonsdale
0:00 / 0:00
▶ Watch on YouTube →
gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this episode of American Optimist, host Joe Lonsdale interviews Boyan Slat, founder and CEO of The Ocean Cleanup, about how pragmatic engineering, technological innovation, and an entrepreneurial mindset can successfully tackle global plastic pollution in oceans and rivers.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Joe holds 21.7% of the talking time here. How this is scored →
Joe as informed peer 4.0 Guest teaching 5.3 Guest disagreement 1.7 Joe pushing back 0.4
speaking balance: gold is Joe, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 30:45 Slat rejects degrowth as fundamentally irrational
Slat firmly dismisses the degrowth philosophy, arguing that degrowth proponents themselves would never ask for salary reductions and that billions in developing nations deserve modern prosperity.
Hardest push from Joe ▶ 7:03 Lonsdale attributes environmental obstructionism to post-Soviet MarxismLonsdale forcefully reframes environmental activist opposition into an ideological critique of former Marxists co-opting green causes to attack capitalism rather than solve problems.
Biggest teaching moment ▶ 16:35 Mathematical breakthrough on towing versus passive herdingSlat walks through the counterintuitive hydrodynamic and mathematical modeling that proved active boat towing consumed less fuel and replaced 800 passive drifting systems with just 10 active units.
Joe holds their own ▶ 32:15 Lonsdale on giant sloths and evolutionary biologyLonsdale builds upon Slat's megafauna reference by demonstrating historical knowledge of North American megafauna, eighteen-foot ground sloths, and the co-evolution of avocados.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Joe as informed peer | Guest teaching | Guest disagreement | Joe pushing back | Why |
|---|---|---|---|---|---|---|
| Boyan Slat's Background and the Diving Trip That Inspired Him | 3 | 3 | 1 | 0 | Lonsdale opens enthusiastically, welcoming Slat and detailing his transition from university dropout to Thiel Fellow. Slat explains how witnessing plastic pollution while diving at age 16 spurred his engineering obsession. | |
| Boyan's Childhood Tinkering and Parental Encouragement | 4 | 3 | 0 | 0 | Lonsdale shares background on post-WWII Mediterranean fishing practices while asking about Slat's entrepreneurial spirit. Slat recounts childhood chemistry experiments making smoke bombs with ammonium nitrate and sugar. | |
| Confronting the 'Conflict Mindset' in Environmentalism | 5 | 6 | 3 | 1 | Slat breaks down the 0.1 percent ocean plastic emission metric to explain why targeted cleanup is more practical than waiting for global production bans. Lonsdale contrasts engineering problem-solving with activist ideologies, which Slat formalizes as conflict mindset versus engineering mindset. | |
| Mapping the Great Pacific Garbage Patch and Microplastics | 3 | 6 | 1 | 0 | Slat details the 250 million pounds of plastic floating in the Great Pacific Garbage Patch and explains how satellite data models high-density hotspots. Lonsdale expresses amazement at the geographical scale, comparing it to twice the size of Texas. | |
| System Scalability, Speed Dynamics, and Marine Life Protection | 3 | 7 | 1 | 0 | Slat delivers an extensive engineering breakdown explaining why slow speeds prevent bycatch and how the 2018 System 001 fatigue fracture occurred. He explains how mathematical modeling proved active towing with 10 systems was vastly superior to deploying 800 passive barriers. | |
| Funding the Mission, Major Donors, and Depoliticizing Ecology | 4 | 6 | 1 | 0 | Slat explains his diverse donor base across the political spectrum and shares data showing that 1 percent of rivers cause 80 percent of riverine ocean plastic. Lonsdale and Slat agree on the importance of depoliticizing environmental engineering. | |
| Navigating Local Partnerships, Ethics, and Bureaucratic Hurdles | 4 | 4 | 2 | 1 | Slat discusses navigating bespoke municipal arrangements in developing countries and maintaining strict ethical stances when confronted with bribe solicitations. Lonsdale commends the refusal to compromise institutional integrity. | |
| The Paradox of Environmental Permitting and Activist Mindsets | 4 | 6 | 3 | 1 | Slat highlights the irony of environmental regulations delaying cleanups and draws a parallel to the medical Hippocratic oath to argue for holistic cost-benefit analysis. Lonsdale adds an example of bureaucratic delays in space exploration. | |
| Debunking Degrowth and Embracing Technological Progress | 5 | 7 | 4 | 1 | Slat directly dismantles the degrowth movement, citing quaternary megafauna extinctions to show that pre-industrial humanity still caused ecological damage. Lonsdale contributes with details about prehistoric giant sloths and avocado evolutionary history. | |
| Exceptional Cost Efficiency of Engineering Solutions | 5 | 5 | 1 | 0 | Lonsdale contrasts Slat's 50 million dollar annual budget against the billions spent on regulatory bureaucracy, while Slat emphasizes that ocean plastic is among the cheapest global challenges to fix. Both close on an inspiring call for techno-optimism. |
Statements from this episode (25)
Slat: University is a means to an end and not for everyone
“University is, is kind of a means to an end. I think, you know, I employ a lot of people that do have engineering degrees. Of course we need those. But I don't think it's necessarily the right path for everyone. And, you know, if you can reach your goals witho…”
Lonsdale is building a new university in Austin, Texas
“I think obviously there's a role for university. I'm building one here in Austin, but agree with you. A lot of these things, you know, not everyone needs to go.”
Slat: Only about 0.1% of annual plastic production reaches the oceans
“Looking at the latest data, so roughly four hundred million tons of plastic is being produced every year. And of that, it's only in the order of a few 100,000 tons that makes it to the ocean. So it's like zero upon one percent.”
Slat: Stop ocean pollution by targeting ocean-bound plastic over total production
“It's our view that if you want to quickly stop plastic from polluting the ocean, you should probably first focus on that 0.1% rather than the whole thing.”
Lonsdale: Many green activist leaders are former Marxists opposing capitalism
“There was a very, very big movement in the seventies and eighties that was very Marxist. And then when Soviet Union fell, A lot of the Marxists became kind of the leaders of the green activists. So I think a lot of their solutions are, let's get rid of capital…”
Slat: Great Pacific Garbage Patch holds roughly 250 million pounds of plastic
“So there are five areas in the world where the plastic, once it's in the ocean, converges and concentrates. The largest one is this Great Pacific Garbage Patch between Hawaii and California. And yeah, there's roughly two hundred and fifty million pounds of pla…”
Slat: Ocean Cleanup system is largest self-propelled ocean system at 1.5 miles
“It's the largest self-propelled system ever deployed on the ocean. It's a mile and a half long, approximately.”
Slat: Ocean Cleanup sweeps a football field of ocean every five seconds
“It sweeps an area of ocean clean the size of a football field every five seconds.”
Slat: Ocean Cleanup needs 10 systems over 10 years for Pacific patch
“For the Great Pacific Garbage Patch if we get to nominal performance, you know, which is the goal for the next nine months with our current system, we would need about 10 of those systems to get the job done in 10 years.”
Slat: Ocean Cleanup bycatch rate averages roughly 0.1%
“Regular fisheries usually has a bycatch rate of around, you know, 10, 15% on average. I mean, arguably a hundred percent because the thing they do is catch sealant. But yeah, we have average roughly 0.1%.”
Slat: Ocean Cleanup lost $10M when first 2018 system broke
“So back in 2018, you know, of course we had done hundreds of scale model tests, lab tests, et cetera, but then we said, okay, let's just build the full scale thing in one go. It was this big launch in San Francisco, took the thing out. It was you know, we were…”
Slat: Ocean Cleanup technology will be ready to scale by late 2024
“And yeah, I think in about nine months time, we should be at the point that we can say, Hey, we're ready. We're ready for this. The technology is ready. Now it's just up to the willingness of the world to make this happen and make it scale.”
Slat: Benioff, Gebbia, Maersk, and Kia are major Ocean Cleanup backers
“Up to, you know, like a big gifts from people like Mark Benioff Joe Gebbia as well as some companies. So, you know, Maersk, the shipping company is, is a big backer. Kia, the car company.”
Slat: 1% of rivers produce roughly 80% of global river plastic emissions
“And what we found is that just one percent of the world's rivers do, you know, roughly 80% of all the plastic emissions. So it's very concentrated, and mostly in, indeed, these, you know, big coastal cities in, in middle-income countries.”
Slat: Permitting bureaucracy is the main obstacle for deploying river interceptors
“I think the main hurdle is just that it's new, it's different. There's not a you know, a certain category of permit for Interceptors, you know, plastic interceptors. So so I think that's the main issue. It's not a question of, you know, are they unwilling to s…”
Slat: The Ocean Cleanup has faced bribe requests from local officials
“Oh, well, without mentioning names, of course, but we've definitely been in situations where you're being asked for you know, for bribes and things like that.”
Slat: A Malaysian real estate developer funds local Ocean Cleanup operations
“So for example, Malaysia there, it's a local real estate developer that is our boots on the ground. You know, they, Want to develop real estate along the river, but their problem is that it's one of the most polluting rivers in the world. So by supporting us, …”
Slat: Permitting delays have left hundreds of tons of plastic in oceans
“So you can argue that it's like hundreds of tons of plastic in the ocean today because of environmental lawyers.”
Slat: Nonprofit critics of The Ocean Cleanup oppose big machines, not cleanup
“Even people who run nonprofits that clean plastic by hand off beaches, like they are at times like very critical about what we do. So it's like, okay, clearly it's not about the cleanup part. You're not against removing plastic from the environment. You're jus…”
Slat: Modern per-capita environmental impact is smaller than hunter-gatherers'
“So I think per capita, our environmental impact today is actually smaller than the hunter gatherers.”
Slat: The Ocean Cleanup's budget is around $50M per year
“Our budget right now is, is around fifty million a year.”
Lonsdale: The EPA spends $7 billion annually to stop domestic building projects
“The EPA spends seven billion dollars a year to basically harass us not to build things here in the US.”
Slat: Ocean plastic cleanup requires a few hundred million dollars annually
“To solve the, you know, the global inflow and to clean up the legacy pollution. If we want to do that over the next 10 years, you're talking about a few hundred million per year for the whole.”
Lonsdale: Nuclear power and carbon capture can solve climate change
“If you combine like more advanced nuclear power, With more advanced carbon sequestration, I think the numbers actually add up for a builder to solve that problem too, versus, versus going at the core and attacking capitalism.”
Slat: Climate change is a product of inferior technology
“Climate change, CO two is, is definitely a product of inferior technology. And we, you know, I truly believe that through, you know, innovation and you know, new, better technology, we can Live lives that are even more prosperous than today, while at the same …”