Enough cobalt for hundreds of thousands of electric car batteries could be collected by dangling plastic balls from disused oil rigs in the Gulf of Mexico
Source:
https://www.newscientist.com/article/2201637-cobalt-for-500000-electric-cars-could-be-harvested-from-the-oceans/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home