sàn casino đổi thưởng tiền mặt uy tín SỐ 1 ，Bạn có thể nạp và rút tiền với； Ví điện tử ; đồng tiền ảo; usdt; an toàn tiện lợi và có độ bảo mật cao. Mọi thông tin chi tiết xin liên hệ URL:www.vng.app。
VICTORIA, Canada - Docked at a Canadian port, crew members returned from a test run of the Ocean Cleanup's system to rid the Pacific of plastic trash were thrilled by the meager results — even as marine scientists and other ocean experts doubted the effort could succeed.
The non-profit, launched in 2013 amid buoyant media coverage, hopes to clear 90% of floating plastic from the world's oceans by 2040. But the group's own best-case scenario — still likely years away — envisions removing 20,000 tonnes a year from the North Pacific, a small fraction of the roughly 11 million tonnes of plastic flowing annually into the oceans.
And that amount entering the ocean is expected to nearly triple to 29 million tonnes annually by 2040, according to the Pew Charitable Trusts https://www.pewtrusts.org/en/about/news-room/press-releases-and-statements/2020/07/23/research-finds-plastic-flows-into-the-ocean-expected-to-triple-by-2040.
The Ocean Cleanup, funded by cash donations and corporations including Coca-Cola, as well as in-kind donors like A.P. Moller-Maersk, had fixed assets over $51 million (43 million euros) at the end of 2020.
During 120 hours of deployment last month, System 002 — or "Jenny" as the crew nicknamed it — scooped up 8.2 tonnes of plastic, or less than a garbage truck’s standard haul. The Ocean Cleanup spokesperson Joost Dubois described the amount as "on the high end of our estimates" and emphasized that it was still just in the test phase.
"I think they’re coming from a good place of wanting to help the ocean, but by far the best way to help the ocean is to prevent plastic from getting in the ocean in the first place," said Miriam Goldstein, director of ocean policy at the Center for American Progress think tank.
"Once plastic has gotten into the open ocean, it becomes very expensive and fossil-fuel intensive to get it back out again."
The Ocean Cleanup's first target is the Great Pacific Garbage Patch, the world’s largest swirling mass of marine debris spanning 1.6 million square kilometers in the North Pacific between California and Hawaii. The group estimates the patch holds at least 79,000 tonnes of plastic.
If the flow of plastic into the ocean continues unabated, the seas will contain more plastic mass than fish by 2050, according to the World Economic Forum https://www.weforum.org/press/2016/01/more-plastic-than-fish-in-the-ocean-by-2050-report-offers-blueprint-for-change.
The Ocean Cleanup, created by Dutch inventor Boyan Slat when he was 18, initially planned on using an autonomous floating system driven by wind, waves and currents to remove plastic. But that first system, named Wilson, bobbed ineffectively alongside the garbage until it ultimately broke. A later design, System 001B, was more efficient, but the team estimated they would need 150 such systems to clear the patch at a high cost.