LimitingtheUseofDisposablePlasticBagsThedisposableplasticbagshavebeenusedwidely.Theyareusedinmanyplaces,suchassupermarkets,farms,etc（etc可以去掉,然后第一句和第二句用连接词可以合并成一句）.Peoplethinkthatthedisposableplasticbagisconvenientandcheap（考虑下怎样才能更好的把第二句和第三句连接起来，比如在第二句和第三句之间加些内容）.However,asweknow,acoinhastwosides.Thedisposableplasticbagscausealotofproblems.Firstly,Thedisposableplasticbagsaredifficulttobedegraded.Itwilltakemanyyearstobedegraded（这两句话可以合成一句话，而且这两句话有重复的嫌疑）Sothereis（is改为wouldproduce比较好）seriousenvironmentalpollution.Secondly,ifthedisposableplasticbagsaredegraded,theywillgeneratealotofharmfulgas.Thegascanletushaveavarietyofdiseases（这句话再修改下，不太符合英文的比较习惯）.Thirdly,ifthedisposableplasticbags（加个动词arepouredintotheriver,willbecomeariverpollution（句子的主语不见了，句子意思不通，中国式英语，再思考下）.Overall,limitingtheuseofdisposableplasticbagsisnecessaryanditisofgreatsignificance.Itisbeneficialtotheenvironmentalprotection.Itishelpfulformorepeopletodeveloptheconsciousnessofenvironmentalprotection（这三句话用连接词连接起来，因为都是讲限制使用塑料袋的好处，最好把more去掉，因为文中没有可对比的人员）.