The uncertainties come from synthetic action of input and output structure, investment of pollution control, environment policies, etc.
这种不确定性主要来自于经济的投入和产出结构、污染治理投入和环境政策等因素的综合作用结果。
Based upon the improved Input Output model of environment economy resources pollution control, the regional multiple objective optimization model of water environment economy is established.
基于改进的经济、环境、资源、污染治理投入产出模型，建立了区域水环境经济多目标优化规划模型。
Therefore, it is necessary to keep a high level of input into control of environmental pollution.
因此，有必要对环境污染控制的投入保持较高水平。
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