Inhalation exposure simulation of chemical agents and nanomaterials. Near-field and far-field zone modeling for occupational and battlefield scenarios. Inhalation Modeling Exposure Zones Risk Assessment Post-activity environmental assessment and chemical persistence modeling Military activities can leave lasting environmental footprints. Our SimpleBox4Planet-based tools assess the long-term distribution and persistence of chemical agents in water systems, soil, and atmospheric reservoirs following military operations. Climate-dependent retention models evaluate chemical distribution across marine, freshwater, and subsurface reservoirs, enabling comprehensive environmental impact assessment and remediation planning. Combined with inhalation exposure modeling for both near-field and far-field zones, we provide end-to-end safety analysis for personnel and ecosystems. Water Safety Assessment Predict chemical retention and persistence in marine, freshwater, and groundwater systems Climate-Dependent Modeling Account for regional climate conditions in chemical distribution predictions Inhalation Exposure Near-field and far-field exposure zone modeling for personnel safety