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各种有害物质和有害因素对环境的污染,按其特性可分为化学性污染(如化学毒物、化学致癌物质)、物理性污染(如噪声、振动)和生物性污染(如细菌、病毒、霉菌)。许多国家公害问题的研究情况表明,环境污染对人体的危害,不仅能引起急性、亚急性中毒,而且还可致畸、致癌、致突变。本文对下面十几种主要化学污染物的来源及其对人体的危害作简单介绍。二氧化硫是无色有刺激性的气体。由于二氧化硫污染面很广、量大,各国都把它作为大气污染的一项重要指标。二氧化硫主要是煤和石油燃烧时产生的。1吨煤中有5～50公斤的硫磺,1吨石油中有5～30公斤的硫磺,这些硫磺燃烧时将产生2倍硫磺重
Various kinds of harmful substances and harmful factors on the environment pollution, according to their characteristics can be divided into chemical pollution (such as chemical poisons, chemical carcinogens), physical pollution (such as noise, vibration) and biological contamination (such as bacteria, viruses, Mold). Research on the issue of pollution in many countries shows that the harm to human beings caused by environmental pollution can not only cause acute and subacute poisoning, but also can cause teratogenicity, carcinogenesis and mutagenesis. This article gives a brief introduction of the sources of the following dozen major chemical pollutants and their hazards to humans. Sulfur dioxide is a colorless and irritating gas. Since sulfur dioxide pollution is very broad and large, all countries regard it as an important indicator of air pollution. Sulfur dioxide is mainly produced when coal and oil are burned. 5 to 50 kg of sulfur in 1 tonne of coal and 5 to 30 kg of sulfur in 1 tonne of petroleum will produce 2 times more sulfur when burned