Automotive urea yog ib qho tshwj xeeb pa roj ntsha purifying thiab txo tus neeg sawv cev rau lub cav diesel. Nws yog ib qho kua xaum qhuav uas muab cia rau hauv ib lub thauv tshwj xeeb rau ntawm lub tsheb hluav taws xob. Thaum cov pa roj tawm ntawm lub cav, nws ncav cuag SCR catalytic converter nrog rau cov pa pa, mam li hloov cov nitrogen oxides rau hauv nitrogen thiab dej tsis huv, kom zoo li txo cov emissions. Urea feem ntau hu ua AdBlue los yog def nyob rau hauv cov teb chaws txawv, thiab lub cav tsheb nruab nrab ntawm lub tshuab muaj AdBlue muaj ib lub thawv khaws cia. Tam sim no, SCR (selective catalytic reduction technology) yog thawj qhov kev xaiv ntawm diesel engine Lub teb chaws tus qauv siv technology. Kev siv lub tshuab ua haujlwm hauv teb chaws yog pib siv SCR cov cuab yeej siv los ua kom tau raws li qhov yuav tsum tau ua. Yuav kom txo tau cov kev ua qias tuaj yeem ua rau lub tsheb quab yuam mus rau lub chaw ua haujlwm, Tuam Tshoj yuav ua kom tiav cov qauv ntawm plaub lub tebchaws.
Nrog rau kev siv ntawm lub teb chaws lub plaub hnub teem yog maj mus cuag, urea, cov tshuaj tshuaj lom neeg tseem yuav tsum tau ci tshiab lub neej loj hlob. Qhov tseeb, nyob hauv Tebchaws Europe, 2006 tau pib siv txoj cai no. European Diesel Cov dej tua kab mob hu ua Adblue. Nyob rau hauv Teb Chaws Asmeskas, pib thaum xyoo 2010, nrog rau qhov kev tsim ntawm EPA2010, tab sis kuj tseem ceeb ntxiv rau daim ntawv thov kev siv tshuaj tua kab tsuag, nyob hauv Teb Chaws Asmeskas, lub tshuab hluav taws xob dais hu ua DEF (Diesel exhaust fluid). Tus sawv cev tseem ceeb muaj BLUEDEF thiab hais txog. Hauv tsev, txawm li cas los xij, cov roj ntawm cov roj diesel tseem yog ib qho kev lag luam tshiab. Tam sim no, txawv teb chaws European lag luam noj, nyob rau hauv 2006, cov European Urea muag network tau raug tsim, feem ntau cov khw muag khoom taw qhia thiab urea twj nres tsheb ob hom. Nws yog tam sim no ua tau kom yuav AdBlue ntawm cov roj noj thoob teb chaws Europe.
Nyob rau hauv 2010, nws cov kev xav tau ua lag luam tau muag ntau dua 3 lab tons.