Cov hnab ntim khoom muag, lossis cov xuab zeb ntev, tau siv sijhawm ntev heev thiab tuaj yeem tuav txhua qhov chaw ntawm ob peb tons ntawm cov khoom .
Tam sim no, nrog kev loj hlob tseem ceeb ntawm kev cuam tshuam loj thiab txo cov khoom siv ib puag ncig thiab kuj tseem ceeb ntawm cov neeg siv khoom noj thiab txo lawv cov hneev taw ntxiv thiab txo lawv cov pa roj carbon monoxide}
Siv pcr hauv cov hnab ntau lawm yog cov kauj ruam zoo rau yav tom ntej thiab tsis pom zoo rau cov kev cog lus nkauj xwb rau kev ua lub luag haujlwm ua haujlwm.
Raws li qhov kev thov rau cov kev xaiv hauv eco-fromatives txuas ntxiv mus, kev siv PCR nyob rau kev xav tau cov khoom siv kom sib npaug
