| SR | Surface Roughness |
| TEI | Total Environmental Impact |
| LCA | Life Cycle Assessment |
| IPO | Input-Process-Output |
| GRA | Grey Relational Analysis |
| GRC | Grey Relational Coefficient |
| GRG | Grey Relational Grade |
| CT | Cooling Technologies |
| AP | Acidification Potential |
| AE | Aquatic Eutrophication |
| GW | Global Warming |
| POFH | Photochemical Ozone Formation-Impact on Human Health and Materials |
| POFV | Photochemical Ozone Formation—Impact on Vegetation |
| SOD | Stratospheric Ozone Depletion |
| TE | Terrestrial Eutrophication |
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