近年来人们发现,居室内小环境的污染比大环境的污染有时更加严重。有的居室光线暗淡,通风欠佳,尤其到了冬天门窗紧闭,如有吸烟的人则造成更严重的室内空气污染。居室空气污染,会严重影响人体健康。 In recent years, people have found that the pollution in the small indoor environment is sometimes more serious than that in the large environment. Some homes have dim light and poor ventilation. Especially in the winter, doors and windows are closed, and people who smoke have caused more serious indoor air pollution. Indoor air pollution can seriously affect human health.