Itisimportanttodealattherubbishincities.Howtopropertrea...
問題詳情:Itisimportanttodealattherubbishincities.Howtopropertreatrubbishwhatmaycausealotofproblemsshouldbestudiedcarefully.Theymaypollutetheairandthewater.Nowwe’vetakensomemeasures.Somerubbishissorted...