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Halfway between California and Hawaii, ocean currents spiral into a slow vortex called the North Pacific Gyre. Anything that floats eventually drifts there — and for seventy years, what floats has been plastic. An estimated 1.8 trillion pieces, around 80–100 million kilograms of it, circle in what's known as the Great Pacific Garbage Patch.
In 2013, a Dutch teenager named Boyan Slat founded a nonprofit on a contrarian bet: that the patch wasn't a permanent fact of the ocean, but a removal problem — one you could engineer your way out of. The organization he started, The Ocean Cleanup, set a goal that most oceanographers considered somewhere between audacious and impossible: remove 90% of floating ocean plastic by 2040.
But before you can judge that bet, you need to feel the other side of the equation — the rate at which plastic is still arriving.
That's the midpoint of the scientific estimate of 0.8–2.4 million tonnes per year entering the sea from rivers (Lebreton et al., 2017). The tap is running. Which raises the question every cleanup skeptic asks: what's the point of mopping the floor while the faucet is on?
The Ocean Cleanup's answer changed the whole field: you don't have to fix every river. Their research found that about 1,000 rivers — roughly 1% of the world's rivers — carry an estimated 80% of the plastic reaching the sea. The faucet has a small number of handles.
An Interceptor is a solar-powered barrier-and-conveyor system anchored in a polluted river. A floating boom angles across the current, guiding debris into a collection hopper before it can reach the sea. More than twenty of them now operate in rivers across Asia, the Americas and the Caribbean.
Below is a polluted river flowing left to right, toward the ocean. Right now, everything gets through. Deploy the Interceptor and watch the capture rate. Then try hitting it with a storm surge — the real test. After heavy rainfall in 2024, a single barrier system in Guatemala's Rio Las Vacas caught over a million kilograms in a matter of hours.
Summary of this interactive: plastic flows down a river toward the sea. With no barrier, all of it escapes. Deploying the Interceptor — a solar-powered boom angled across the current — guides debris into a collection hopper, and the capture-rate readout below shows what proportion is caught. A storm surge sharply increases the debris load, as happened in Guatemala's Rio Las Vacas in 2024.
Notice what happened in the simulation: even a well-placed barrier doesn't catch everything. Real-world capture rates vary with flood pulses, debris type and river shape. The strategy isn't perfection in one river — it's coverage of the rivers that matter. In 2025 the organization announced its 30 Cities Program, targeting Interceptor deployments across thirty of the highest-polluting urban river systems, aiming to cut up to a third of all riverine plastic pollution by 2030.
But interception only stops new plastic. The 80–100 million kilograms already spinning in the Pacific gyre isn't going anywhere on its own — most of it degrades in place, shedding microplastics into the food chain for decades. Someone has to go get it.
In the open Pacific, the organization tows a U-shaped floating barrier — currently System 03, roughly 2.2 km wide — slowly through debris hotspots. It concentrates scattered plastic into a retention zone that's periodically emptied onto a support vessel. At full pace it sweeps an area the size of a football field every five seconds.
Drag across the water below to tow your own system through the patch. Keep moving — the boom only collects while under way. See how long it takes you to clear 90%.
Summary of this interactive: plastic in the North Pacific Gyre collects in drifting hotspots rather than spreading evenly. A U-shaped barrier is towed slowly through them and only collects while under way, so clearing the patch is a matter of sustained time on the water rather than a single pass. Keyboard: focus this panel and use the arrow keys to tow the barrier; the percentage cleared is reported below.
In March 2026, The Ocean Cleanup crossed fifty million kilograms of trash removed across all its operations — rivers, coasts and the open ocean. For scale: that's more than half the estimated mass of the Great Pacific Garbage Patch itself.
The criticisms are real and worth knowing.
The headline total is dominated by river and coastal work, where plastic is densest and cheapest to stop. That's a sensible place to start — but it means the number says less about open-ocean performance than it first appears.
Some scientists argue that near-shore and river work recovers far more plastic per dollar than open-ocean systems, and that the money spent towing barriers through the gyre would remove more plastic if it were spent closer to land.
No cleanup can outpace the growth in plastic production without policy change — a point the organization itself concedes, and why it campaigns for a global plastics treaty alongside running the machines.
What's no longer in dispute is that engineered cleanup works at meaningful scale. The question has shifted from whether to how fast — and funding is the throttle.
This is independent editorial content — we are not affiliated with The Ocean Cleanup and receive nothing from the link below. If you'd like to support the work described, you can give directly.
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