Leopold matrix
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The Leopold matrix is a qualitative environmental impact assessment method, used to identify the potential environmental impact of a project on the environment. The system consists in a matrix with columns representing the various activities of the project, and rows representing the various environmental factors to be considered. The intersections are filled in to indicate the magnitude (from -10 to +10) and the importance (from 1 to 10) of the impact of each activity on each environmental factor.