| HSR | High-speed railway | PA | Process analysis |
| EMU | Electric multiple unit | IOA | Input–output analysis |
| LCA | Life cycle assessment | GHG | Greenhouse gas |
| CO2 | Carbon dioxide | SO2 | Sulfur dioxide |
| NOx | Nitrogen oxides | COD | Chemical oxygen demand |
| NH3-N | Ammonia nitrogen | TP | Total phosphorus |
| TN | Total nitrogen | Cr | Chromium |
| Pb | Plumbum | Hg | Mercury |
| As | Arsenic | Cd | Cadmium |
| Cu | Cuprum | Zn | Zinc |
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