城市环境治理包括城市大气污染治理、城市水污染治理、城市固体废物污染治理、城市噪声污染治理等四类。
Urban environment treatment includes urban air pollution treatment, urban water pollution treatment, urban solid waste pollution treatment and urban noise pollution treatment, etc.
因而城市污水治理是水污染控制的决定性步骤。
So harness on municipal wastewater is crucial step on wate pollution control schedule.
目前小清河流域水体已经受到严重污染，污染源主要为城市工业生产和生活污水，因此城市污水治理是水污染控制的关键。
The pollutants mainly come from the urban industrial production and livings of residents. Therefore, the key to water pollution control is the urban sewerage control.
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