Polluted air.
D000328:Adult; D000397:Air Pollution; D002648:Child; D003031:Coal; D004782:Environmental Health; D005260:Female; D006361:Heating; D006801:Humans; D008297:Male; D008875:Middle Aged; D012140:Respiratory Tract Diseases / Q000209:etiology; D012907:Smoking; D006113:United Kingdom; D001335:Vehicle Emissions
D003031:Coal; D001335:Vehicle Emissions