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EPA yog US Environmental Protection Agency (US EnvironmentalProtectionAgency) cov ntawv luv ntawm nws txoj haujlwm tseem ceeb yog los tiv thaiv tib neeg kev noj qab haus huv thiab ib puag ncig ntuj EPA muaj nws lub tsev hauv paus hauv Washington, dc, muaj 10 lub chaw haujlwm hauv zos thiab kaum ob lub chaw soj nstuam hauv tebchaws United States ntau tshaj li ib nrab. 18000 tus neeg ua haujlwm lawv yog engineers, cov kws tshawb fawb thiab cov kws tshuaj ntsuam xyuas txoj cai yog lub luag haujlwm rau ntau qhov haujlwm ib puag ncig los teeb tsa lub teb chaws tus qauv, Saib xyuas kev ua tiav ntawm cov qauv kev cai thiab ua raws li EPA koom nrog lub xeev thiab tsoomfwv hauv nroog tau tshaj tawm cov ntawv tso cai ua lag luam thiab kev lag luam EPA ntawv pov thawj, Lub hom phiaj tseem ceeb ntawm Teb Chaws Asmeskas Kev Tiv Thaiv Ib puag ncig EPA yog los tiv thaiv tib neeg kev noj qab haus huv tiv thaiv ib puag ncig ecological, dej thiab av, huab cua peb nyob hauv ib puag ncig tom qab tsim muaj ntau tshaj 30 xyoo, EPA tau tsim kom muaj kev huv thiab ib puag ncig noj qab haus huv rau cov neeg Amelikas thiab ua haujlwm zoo yog tias ua raws li cov kev cai ntawmEPA, EPA yuav ua raws li daim ntawv pov thawj.
