*Article* **Environmental Efficiency Analysis for Multi Plants Production Technologies**

**Mojtaba Ghiyasi 1,\* and Farhad Taghizadeh-Hesary 2,\***


**Abstract:** The current article extends the literature by proposing new models for estimating the classical and environmental performance of multi-plant firms. This yields some new indices for capturing the environmental performance vs. classical economic performance at the local and global level. The proposed approaches and indices were applied for the economic and environmental performance assessment of 46 power plants in Iran. The primary result emphasizes considering not only local environmental performance but also global performance to have a broad insight of environmental performance assessments. Moreover, we find only a few power plants with a resistant environmental performance at the global level. Proposed models in this article are general because they can be utilized in environmental analysis of any multiple plant production units.

**Keywords:** DEA; multi plant firms; environmental assessment; local-global performance

**Citation:** Ghiyasi, M.; Taghizadeh-Hesary, F. Environmental Efficiency Analysis for Multi Plants Production Technologies. *Sustainability* **2021**, *13*, 3989. https://doi.org/10.3390/su13073989

Academic Editor: Enrique Rosales-Asensio

Received: 24 February 2021 Accepted: 29 March 2021 Published: 2 April 2021

**Publisher's Note:** MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.

**Copyright:** © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
