<p>Predicting the dispersion of pollutants is essential for environmental assessment, especially near industrial sites, as outdoor pollution is currently a major environmental problem. This study aims to evaluate the behaviour of pollutants emitted from Mellitah in western Libya by Computational Fluid Dynamics (CFD) simulation. The prediction of pollutant dispersion and emission behaviours was examined using ANSYS CFX V19. The simulation was performed under different conditions of atmospheric stability conditions and wind velocity. Emissions were found to be effected by changes in atmospheric stability, velocity and wind direction. When wind velocity dominates exhaust emissions from the stack, the wake zone immediately behind the stack becomes a key area for pollutant accumulation. Furthermore, unstable atmospheric conditions worsen the problem by restricting pollutant dispersion, leading to higher concentrations in certain areas and increasing the risk of environmental and health impacts. Another potential source of pollution may arise in the event of storage tank fire accidents. Another potential source of pollution may arise in the event of storage tank fire accidents. In such cases, the CO₂ critical concentration region presents a significant risk of pollution, especially under high wind speeds and neutral to slightly unstable atmospheric conditions. This risk extends from a height of 16 m above the ground and within a radius of approximately 200 m around the emission sources, and can spread up to 500 m downstream.</p>