s ▁study ▁( 2 0 2 0 ) ▁demonstrate ▁that ▁some ▁marine ▁de br is ▁can ▁travel ▁hundreds ▁of ▁kilom eters ▁and ▁end ▁up ▁very ▁far ▁from ▁its ▁source ▁because ▁of ▁the ▁ocean ▁and ▁sea ▁curr ents . ▁ ▁Also , ▁tropical ▁and ▁subt rop ical ▁islands ▁are ▁marine ▁poll ution ▁hot ▁sp ots ▁as ▁their ▁relatively ▁vulner able ▁e cos ystem s ▁are ▁being ▁sever ely ▁affected ▁by ▁both ▁local ▁and ▁foreign ▁marine ▁de br is . ▁de ▁Sc is ci olo ▁et ▁al . ▁( 2 0 1 6 ) ▁study ▁on ▁ten ▁be aches ▁along ▁the ▁le ew ard ▁and ▁wind ward ▁coast lines ▁of ▁Ar uba ▁that ▁is ▁one ▁of ▁the ▁L esser ▁Ant illes ▁islands ▁located ▁in ▁the ▁Southern ▁Car ib bean ▁Sea . ▁They ▁try ▁to ▁determine ▁differences ▁of ▁marine ▁de br is ▁in ▁macro ▁( > 2 5   mm ), ▁mes o - de br is ▁( 2 – 2 5   mm ) ▁and ▁micro - de br is ▁( < 2   mm ) ▁dens ities . ▁The ▁result ▁of ▁their ▁study ▁shows ▁that ▁mes o - de br is ▁which ▁are ▁rounded ▁pl astic ▁products ▁are ▁found ▁on ▁the ▁wind ward ▁coast lines ▁because ▁the ▁wind ward ▁coast lines ▁experience ▁higher ▁pressure ▁from ▁dist al ▁marine - based ▁de br is . ▁Natural ▁factors ▁such ▁as ▁wind ▁and ▁ocean ic ▁curr ents ▁cause ▁the ▁accum ulation ▁and ▁distribution ▁of ▁pl astic ▁mes o - de br is ▁to ▁wind ward ▁coast lines