Giant plastic catcher heads for Pacific Ocean clean-up
When a Dutch teenager went swimming in the sea in Greece seven years ago, he was shocked to see more plastic than fish.
In fact, Boyan Slat was so appalled by the pollution that he soon started to campaign for the oceans to be cleaned up.
For a long time, few people took him seriously. Here was a university drop-out with a far-fetched idea that surely could never work.
But this weekend, backed by major investment and some massive engineering, a vast plastic collection system will be towed out of San Francisco Bay.
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