On Saturday, 25-year-old Boyan Slat unveiled the "Interceptor": a floating, solar-powered device designed to scoop plastic out of rivers, The Associated Press reported.

"We need to close the tap, which means preventing more plastic from reaching the ocean in the first place," Slat said.

Around eight million metric tons of plastic enters the world's oceans every year, where it threatens marine life. However, scientists like University of North Carolina, Asheville assistant professor Rebecca Helm warned that Ocean Cleanup's plan of scooping plastic from the ocean directly could also trap marine organisms. When the organization announced it had finally successfully collected plastic early in October, photographs revealed that this had indeed been the case.

Scientists have also argued that stopping plastic from entering the ocean in the first place would be more effective, Wired explained, and many were pleased that the non-profit seemed to be listening.

"I am really happy they finally moved toward the source of the litter,"Jan van Franeker of the Wageningen Marine Research institute told The Associated Press. "The design, from what I can see, looks pretty good."

Helm also tweeted that she was "encouraged" by the news.

Slat said that 1,000 rivers dump around 80 percent of plastic that flows into the ocean, and he wanted to clean them all in the next five years. So far, the device is installed in rivers in Indonesia, Malaysia and Vietnam. A fourth will soon be installed in the Dominican Republic.

Fast Company explained how it works:

The new technology is designed to anchor to a riverbed, out of the path of passing boats. Like the system that the nonprofit designed for the ocean, which uses a large barrier that blocks part of the river to collect plastic as it floats by, the Interceptor has a floating barrier that directs trash into the system. The device is positioned where the greatest amount of plastic flows, and another device can be placed in farther down the river to catch trash that might escape the first Interceptor. A conveyor belt pulls the trash out of the water, and an autonomous system distributes it into dumpsters on a separate barge, sending an alert to local operators when the system is full and ready to be taken to a recycler.

On an average day, it can collect 50,000 kilograms (approximately 110,000 pounds), for a yearly total of approximately 20,000 tons.

So far, users are happy with the results.

"It has been used for one and a half months in the river and it's doing very well, collecting the plastic bottles and all the rubbish," Izham Hashim from the government of Selangor state in Malaysia said at the launch, as The Associated Press reported.

Wired pointed out that the device wasn't exactly original. Baltimore's Mr. Trash Wheel, which intercepts 200 tons of trash a year, predates it.

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A post shared by Mr. Trash Wheel (@mrtrashwheel) on Oct 26, 2019 at 12:23pm PDT

The Interceptor can clearly collect more, and it is intended to be mass produced and used in rivers around the world, instead of being designed for one particular location, like Mr. Trash Wheel.

"The scientific community has been saying for years that moving upstream is the way to correctly solve this problem," Adam Lindquist, director of the Waterfront Partnership of Baltimore's Healthy Harbor campaign, told Wired. "And certainly imitation is the greatest form of flattery."