Exposure to such mixtures may occur during work involving burning processes, such as from combustion engine exhaust, and high temperature combustion processes, among others.
D'fhéadfadh nochtadh do mheascáin den sórt sin tarlú agus obair a bhaineann le próisis dócháin ar siúl, amhail ó dhóchán sceite innill, agus próisis dócháin ardteochta, i measc nithe eile.