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Can you pelase check this? Thanks



Polycyclic aromatics in mineral oils for lubricating carry cancerogenic risk at chronic exposure/if exposed chronically.

Longer or repeated inhalation of the fumes/vapours created by heating of aromatic oils can cause benign forms of lung fibriosis or cancer of the lungs.
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Polycyclic aromatics in lubricating mineral oils carry carcinogenic risk from chronic exposure.

Lengthier or repeated inhalation of the fumes/vapours created heating aromatic oils can cause benign forms of lung fibriosis or lung cancer.
Comments  
Students: We have free audio pronunciation exercises.
Mister Micawber, is there by missing before heating?
Yes, of course-- I must have deleted it while I was editing the sentence, sorry.
Thank you all.
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