Tsheb emission txheem
Lub tsheb tso pa tawm qauv yog hais txog cov kev cai ntawm cov pa phem xws li CO (cov pa roj carbon monoxide), HC + NOx (hydrocarbons thiab nitrogen oxides), thiab PM (cov khoom zoo, cov nkev) tawm ntawm lub tsheb tso pa tawm. Txij Lub Ib Hlis 1, 2004, Beijing yuav hloov cov pa tsheb tawm ntawm cov pa tawm ntawm cov tsheb tam sim no mus rau Tebchaws Europe II mus rau Tebchaws Europe II. Los ntawm 2008, European No. III tus qauv yuav tau ua tiav.
Cov European Standard yog ua raws los ntawm European Economic Commission (ECE) emission cai thiab cov European Community (EEC) emission cov lus qhia. Lub zej zog European (EEC) yog European Union (EU). Emission cov cai yog pom zoo lees paub los ntawm ECE cov koom tes hauv teb chaws, thiab cov lus qhia emission tau tswj hwm los ntawm EEC lossis EU cov teb chaws koom. European cov kev cai (cov lus qhia) rau cov tsheb pa tsheb tau siv ntau theem ua ntej xyoo 1992. Tebchaws Europe tau pib siv nyiaj Euro I (European Type I daim ntawv pov thawj ntawm cov pa hluav taws xob) txij li xyoo 1992 thiab Euro II (European Type II daim ntawv pov thawj thiab tsim tawm txij xyoo 1996). Emission paib pub muaj txwv tau siv txij xyoo 2000. Euro III (Euro III daim ntawv pov thawj thiab cov khoom lag luam ua tau zoo tshaj plaws) tau siv txij li xyoo 2000, thiab Euro IV (Euro IV cov ntawv pov thawj thiab cov khoom siv hluav taws xob tsis txaus) tau siv txij li xyoo 2005.