For det andet gik de til anlæg for reduktion af luft forureningen fra industrien (jf. rammen s. 29), hvad enten der var tale om olieraffinaderier eller cementfabrikker, der ofte ligger I tæt befolkede områder, eller om kraftværker, ¡sær kulfyrede (470,6 mio).
The second category consists of installations for reducing at source atmospheric pollution (see box article, page 29) caused by oil refineries and cement works often located in populous areas or by power stations, particularly coalfired plant (470.6 million).