An environmental influence assessing method for assessing the influence on the environment of a research theme at its R&D stage is provided. It comprises a step of setting environmental aspects possibly having an influence on the environment when research content in the R&D stage is put into practice; a step of setting predetermined assessment indexes for the set environmental aspects (y1 to y8); a step of selecting from the set environmental aspects those which will have an influence on the environment when the research content being an assessment target is put into practice; a step of computing a sum of the assessment indexes set for the selected environmental aspects; and a step of assessing the environmental influence based on a result of the computing.
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