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![Environmental management efficiency evaluation based on indicator information integration and DEA-Malmquist index](https://image.oaes.cc/5e57422b-e677-4a17-8bc7-16afa034179d/4423.fig.1.jpg)
Figure 1. Framework of environmental management efficiency evaluation. TFPC: Total factor productivity change; EC: efficiency change; TC: technical change; PTEC: pure technical efficiency change; SEC: scale efficiency change; ER: evidential reasoning.