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为了解民用小煤炉对室内空气的污染危害,于1980年在市中心居住人口稠密地区进行了调查。 一、调查区 选以煤球(饼)炉为主的两个里弄居民委员会(简称里委)为调查区;以煤气灶为主的一个里委为对照区。调查区和对照区在一公里半径内无明显的其它污染源。调查区
In order to understand the pollution of indoor air pollution caused by civilian small coal stoves, a survey was conducted in 1980 in a densely populated area in the city center. First, the survey area selected briquettes (cakes) furnace-based two in the neighborhood committees (neighborhood committee) for the investigation area; mainly to a gas stove as the control area. The survey area and the control area within a radius of one kilometer clear no other sources of pollution. Investigation area