Itisimportanttodealattherubbishincities.Howtopropertrea...
问题详情:Itisimportanttodealattherubbishincities.Howtopropertreatrubbishwhatmaycausealotofproblemsshouldbestudiedcarefully.Theymaypollutetheairandthewater.Nowwe’vetakensomemeasures.Somerubbishissorted...