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Industrial fisheries that rely on bottom trawling wasted 437 million tons of fish and missed out on $560 billion in revenue over the past 65 years. A new study documents the growth of bottom trawling between 1950 and 2014, a practice where industrial fishing vessels drag large nets along the sea floor and pull up unwanted or unneeded fish. The research suggests that bottom trawling generates the most waste of any fishing method because the unwanted catch is dumped back into the ocean. [Source: University of British Columbia]
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