简介：Aspartofacomprehensiveenvironmentalmanagementsystem,manycountriesestablishemissioncontroltargetsformassemissionsofapollutant.Suchtargetsareoftenthekeyobjectiveofanenvironmentalpolicy,suchasanemissiontradingprogram.InChina,however,itismorethanjustanobjectiveofoneparticularpolicy;ithasbecomeaconceptthathasinfluencedmanynationalenvironmentalpoliciesandactivities.Theobjectiveofthisarticleistoreviewtheimplementationofthetotalemissioncontrolpolicyinthepast10yearsandexploreemergingissuesinitsimplementation.Thearticlehasthreesections:asummaryoftheimplementationexperience,issueswiththedesignandimplementationofthepolicy,andpolicyrecommendations.

简介：Thedemandforpotablewaterisrisingrapidlyduetoanever-increasingpopulation,economicactivities,anddwindlingwatersupplies.Toprovideadequatewatersuppliesinthefuture,understandingtheissuesandchallengesinthereuseofwateranddevelopingappropriatestrategiesforreusewillbecritical.Onewaytoaugmentwatersuppliesforresidentialuseistoreusegraywater-thewastewaterfromkitchens,bathrooms,andlaundries.Inthisarticle,wecriticallyreviewtheevolutionofwaterreuse,thedefinitionofgraywater,graywaterreusepractices,volumesandflowindifferentsituations,andgraywatercharacteristics.Wethenexaminetheissuesassociatedwithdifferentgraywatertreatmentmethodsandhowusinggraywaterforirrigationaroundhomesaffectssoilqualityandplantgrowth.Thestudyconcludesthatgraywatertreatmentcosts,humanhealthrisks,anditseffectonsoilqualityaresomeofthechallengesthatneedtobeaddressedinthefutureforwidespreadandsustainablereuseofgraywaterforirrigationaroundhomes.

简介：ThecoreissueforChinatransitiondevelopmentinthenext30yearsistoshiftfromthequantitygrowthmodeltothequalityimprovementmodel.Thepaperintroducestheresearchprogressinthreekeyareasofsustainabledevelopmentstudiessincethe1990s.Itispointedoutthatthereisawell-beingthresh-oldatwhichthemarginutilityofeconomicgrowthforhumanwell-beingwilldecline,thatthereisanecologicallimitbeyondwhichmoreeconomicgrowthintermsofphysicalscalewillbeimpossible,andthatthecreationofhumanwell-beingisrelatednotonlytotheamountbutalsotothestructureandefficiencyofpublicexpenditurefromgovernment.Afteranin-depthdiscussiononfacts,originsandpolicyimplicationsofeachissue,sometheoryandpolicythinkingwithlong-lastingsignificanceareraisedforthetransitiondevelopmentofChina.