Greatest ocean pollutant

according to the UN environment program plastic bag make up more than 50% of  all marine  litter with 46,000 pies of plastic for  every  square mile of ocean. In parts of the pacific ocean for every 1kg (2 lb 3 oz) of biomass there are  6kg (13lb 13oz) of plastic. The Blue ocean society for marine conservation  estimates that more than 1million birds and 100,000 mammals die each year from choking on or becoming entangled in plastic.