How much plastic is in the Ocean and can Mr Beast make a difference?

In October of last year popular Youtubers Mark Rober and the enigmatically named Mr Beast pledged to remove 30 million pounds of plastic from the Ocean – if they could raise $30 million dollars. A dollar per pound of plastic sounds like a fairly good deal, but how much plastic is out there and will they actually be removing anything from the Ocean at all? (Image: Sahika Encumen dives amid plastic waste in Ortakoy coastline: photo by Sebnem Coskun/Anadolu Agency via Getty Images)