Emission from the combustion processes can cause adverse effect to the environment. The formation of pollutants such as NOx, CO, CO2 and SOx are hazardous and harmful to the ecosystem. The awareness about the pollution due to the combustion activities, particularly in industrial field has set off an effort to find more comprehensive and enhanced technologies to reduce these pollutants. There are several methods that can be used to reduce the emissions of these pollutants either by combustion modifications or post combustion treatment. In this research, the method used is the post combustion treatment, i.e. the air staging method. By air staging techniques, some of the combustion air will be directed into the primary combustion zone, while the remaining air is directed into the secondary zone. The function of the secondary air is to reduce the peak flame temperatures, which theoretically reduce the emissions of NOx emissions. The primary concern for this research is to study the effectiveness of the air staging in reducing NOx, CO, SO2, and UHC emissions from the combustion process. The results obtained showed significant reduction in all major pollutants, i.e., a 31.8 percent reduction for CO emission, 16.8 percent for NOx, 12.7 percent for SO2 and 10.3 percent for UHC. These reductions were obtained at different equivalence ratios for different gases.