. ▁And , ▁macro - de br is ▁that ▁contains ▁a ▁larger ▁proportion ▁of ▁origin ating ▁from ▁e ating , ▁drink ing ▁and ▁sm oking ▁and ▁recre ational ▁activities ▁are ▁found ▁le ew ard ▁sites ▁of ▁the ▁island ▁because ▁the ▁le ew ard ▁sites ▁experience ▁higher ▁press ures ▁from ▁local ▁land - based ▁de br is ▁such ▁as ▁pl astic ▁pl ates , ▁bott les ▁and ▁pl astic ▁st raw s . ▁ ▁Ghost ▁G ears ▁ ▁Marine ▁de br is ▁consists ▁of ▁millions ▁of ▁tons ▁of ▁abandoned ▁pl astic ▁fish ing ▁g ears . ▁Near ly ▁ 6 4 0 , 0 0 0 ▁tons ▁of ▁pl astic ▁g ears ▁dam ps ▁the ▁o ce ans ▁every ▁year . ▁According ▁to ▁Un ger ▁and ▁Harrison , ▁ 6 . 4 ▁tons ▁of ▁poll ut ant ▁d umps ▁the ▁o ce ans ▁every ▁year , ▁and ▁the ▁most ▁of ▁them ▁are ▁consist ▁of ▁by ▁dur able ▁synth etic ▁fish ing ▁g ear , ▁pack aging , ▁materials , ▁raw ▁pl astic , ▁and ▁convenience ▁items . ▁Such ▁extremely ▁dur able ▁pl astic ▁g ears ▁cannot ▁de compose ▁in ▁the ▁se aw ater ▁and ▁marine ▁environment ▁and ▁they ▁was h ▁up ▁on ▁be aches ▁driven ▁by ▁in sh ore ▁curr ents ▁and ▁wind . ▁Such ▁disc arded ▁g ears ▁such ▁as ▁pl astic ▁fish ing ▁lines , ▁n ets , ▁and ▁flo ats ▁are ▁called ▁“ g host ▁g ear ”. ▁About ▁ 4 6 % ▁of ▁the ▁ 7 9 ▁thousand ▁of ▁g