TheconstructionOfecologicalenvironmentisoneofthefivesignificantprojectsofChina'sWesternDevelopment,andarrangesinthefirstplace.Inthepastfewyears,theconstructionsofecologicalenvironmentmademuchgreatprogress,butexposedmanyurgentproblemstobesolved,Examiningthegainandlossclosely,