| Group | State variables in the model |
| Group 1 | Forest biomass, wildlife species, and population pressure | Group 2 | Forest biomass, wildlife species, and industrialization | Group 3 | Forest biomass, wildlife species, human population, population pressure, and mining activities | Group 4 | Forest biomass, wildlife species, human population, and industrialization | Group 5 | Forest biomass, wildlife species, human population, and population pressure | Group 6 | Forest biomass, wildlife species, human population, and human activities | Group 7 | Forest biomass, human population, population pressure, industrialization, and economic measures | Group 8 | Forest biomass, concentration of pollutants, and environmental pollution concentration |
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