▁to ▁be aches . ▁These ▁poll ut ants ▁harm ▁marine ▁life ▁and ▁e col ogy , ▁human ▁health , ▁and ▁coast al ▁tour ism . ▁Hart ley ▁et ▁al .’ s ▁( 2 0 1 5 ) ▁study ▁shows ▁that ▁environmental ▁education ▁is ▁important ▁to ▁eliminate ▁many ▁beach ▁poll ut ants ▁on ▁be aches ▁and ▁the ▁marine ▁environment . ▁ ▁Marine ▁de br is ▁ ▁There ▁are ▁two ▁causes ▁of ▁the ▁de grad ation ▁of ▁marine ▁e col ogy ▁and ▁marine ▁de br is : ▁the ▁direct ▁forces ▁( pop ulation ▁growth , ▁techn ological ▁development , ▁and ▁economic ▁growth ) ▁and ▁proxim ity ▁forces ▁( land ▁transformation ▁and ▁industrial ▁processes ). ▁We ▁can ▁think ▁of ▁the ▁direct ▁forces ▁as ▁underlying ▁causes ▁of ▁why ▁we ▁consume ▁an ▁excess ive ▁amount ▁of ▁goods ▁by ▁industry ▁process . ▁The ▁excess ive ▁consumption ▁of ▁goods ▁causes ▁marine ▁de br is ▁because ▁the ▁goods ▁have ▁been ▁pack aged ▁by ▁manufact ured ▁cheap ▁non - re cycle ▁materials ▁such ▁as ▁pl astic . ▁Sol id ▁waste ▁pl ast ics ▁cannot ▁de compose ▁easily ▁in ▁nature ▁and ▁their ▁decomposition ▁process ▁takes ▁thousands ▁of ▁years ▁to ▁million ▁years ▁but ▁pl astic ▁breaks ▁down ▁into ▁continu ously ▁smaller ▁pieces ▁( > 5   mm ) ▁forming ▁that ▁is ▁called ▁micro - pl ast ics . ▁Thus , ▁such ▁solid ▁waste ▁products ▁are ▁called ▁marine ▁de br is ▁that ▁can ▁be ▁seen ▁all ▁through ▁coast lines ▁and ▁on ▁many ▁be aches ▁through ▁the ▁world . ▁There ▁can ▁be ▁many ▁sources ▁of ▁marine