Desulfurization gypsum, a byproduct of industry, is being used in various ways like cement and building materials. However, the process of making it produces harmful gases. This study looks at how to make desulfurization gypsum more useful and less polluting. The researchers studied how to make calcium from the gases and how to use the gypsum in industry. They found that there are ways to reduce pollution and make better use of this byproduct.