Yuav Siv sijhawm ntev npaum li cas rau asphalt Paving kom tsis muaj tshuaj lom

Feem ntau, txheej txheem spans ib ncig 20 hnub. Petroleum asphalt feem ntau pom muaj toxicity tsawg, Feem ntau emitting aromatic hydrocarbons. Hloov pauv, coal tar asphalt, nplua nuj nyob rau hauv benzene ntsig txog volatiles, yog tshwj xeeb tshaj yog lom.

Txawm hais tias cov tshuaj no yog inherently toxic, Kev nthuav tawm tseem ceeb dhau lub sijhawm feem ntau tsim nyog los ua kom pom cov teebmeem tshuaj lom.