▁the ▁total ▁amount ▁of ▁ 1 6 , 1 2 3 ▁beach ▁l itter ▁items ▁to ▁determine ▁the ▁source ▁of ▁marine ▁de br is ▁at ▁ 4 0 ▁bath ing ▁areas ▁along ▁the ▁coast ▁of ▁C ád iz , ▁Spain . ▁The ▁study ▁displays ▁that ▁the ▁sources ▁of ▁ 8 8 . 5 % ▁of ▁pl ast ics , ▁ 6 7 % ▁cig aret te ▁but ts , ▁and ▁cloth ▁lit ters ▁are ▁related ▁to ▁the ▁activity ▁of ▁beach - go ers ▁and ▁tour ists , ▁ 5 . 5 % ▁of ▁cot ton ▁sw abs , ▁wet ▁w ipes , ▁san it ary ▁to w els , ▁t amp ons , ▁and ▁cond oms ▁are ▁related ▁to ▁waste water ▁dis charg es ▁at ▁places ▁close ▁to ▁rivers ▁and ▁tid al ▁cre eks ▁mouth s . ▁Besides , ▁the ▁sources ▁of ▁ 2 . 1 % ▁fish ing ▁lines , ▁n ets , ▁and ▁ 0 . 6 % ▁St y ro fo am ▁are ▁related ▁to ▁fish ing ▁activities ▁and ▁marine ▁sources . ▁Besides , ▁some ▁marine ▁de br is ▁indicates ▁that ▁they ▁are ▁dump ed ▁directly ▁by ▁some ▁international ▁ships ▁or ▁by ▁tour ists ▁into ▁the ▁sea ▁on ▁the ▁beach ▁from ▁different ▁countries ▁such ▁as ▁hard ▁food ▁container ▁( from ▁Portugal ), ▁a ▁bott le ▁cap ▁( Mor oc co ), ▁a ▁cleaner ▁bott le ▁( T ur key ), ▁a ▁food ▁wrapper ▁and ▁other ▁items ▁related ▁to ▁navigation ▁( G erm any ). ▁Mont es inos ▁et ▁al .’