In conventional soil environment quality evaluation, the regional soil background values or the contents in the soil control points of evaluated region were used as evaluation criteria.
以往土壤环境质量评价中，一般是以区域土壤背景值或评价区土壤对照点含量作为评价标准。
Ecological environment quality evaluation of gas field development environmental impact assessment is always the most critical part of the environmental impact assessment of the project.
气田开发项目的环境影响评价中生态环境质量评价往往是项目环境影响评价中最关键的内容之一。
Through environmental quality analysis, health effect evaluation and economic efficiency assessment, initially proved interfering effects of centralized heat suPPly measures on the environment.
通过对环境质量分析、健康效应评价和经济效益估算，初步论证了集中供热措施的环境干预作用。
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