Outside the Alcan plant in Yinchuan, China. Brown smoke billows from a chimney. Substation near the plant. Alcan plant in Yinchuan, China. Red flag behind which a white smoke escapes amid brick wall. Chimney belching brown smoke, mountains in background, air pollution (smog). Chimney with brown smoke. Substation near the smelter. Row of pylons close to the electricity distribution station. Keywords: ALCAN,ALUMINUM,ASIA,CHIMNEY,CHINA,AIR POLLUTION,ELECTRICITY STATION,FACTORY