title: A three-year study of air pollution episodes in a semi-rural area.
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D000397:Air Pollution; D001530:Belgium; D012423:Rural Health; D013458:Sulfur Dioxide / Q000032:analysis; D014919:Wind
chemical_list: D000393:Air Pollutants; D013458:Sulfur Dioxide