Cov khoom siv raw ntawm cov yas yog hluavtaws cob, uas yog muab rho tawm thiab ua los ntawm cov roj av, cov pa roj lossis cov thee tawg.Cov roj, cov nkev roj, thiab lwm yam yog decomposed rau hauv cov organic tebchaw uas tsis muaj molecular (xws li ethylene, propylene, styrene, ethylene, vinyl cawv, thiab lwm yam), thiab cov low-molecular ...
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