title: The causes of asthma.
mesh_terms: D000293:Adolescent; D000328:Adult; D000336:Aerosols / Q000009:adverse effects; D000485:Allergens; D001249:Asthma / Q000209:etiology*; D004391:Dust; D006801:Humans; D010936:Plant Extracts; D010944:Plants; D010947:Plants, Toxic; D012189:Retrospective Studies; D012278:Ricinus; D012882:Skin Tests; D013147:Spirometry; D014887:Weather
chemical_list: D000336:Aerosols; D000485:Allergens; D004391:Dust; D010936:Plant Extracts