Recycling of waste materials  resulting from  industrial activity, such as phosphogypsum (PG) released during production of phosphoric acid, proved to be economically feasible. Technologies for the management of (PG) Ca-rich waste into useful products became a hot-spot study. Although carbon dioxide and calcium rich waste constitutes a problem but they can be used for the production of calcium carbonate. This paper summarizes a physical and chemical method for the utilization of phosphogypsum to produce five valuable products, such as, CaSO₄.2H₂O, K₂SO₄, Ca(OH)₂ , (NH₄)₂ SO₄ , and CaCO₃ from phosphogypsum (PG). These chemicals  are used as catalyst, fertilizes and basic chemicals for food and chemical industries. Results shows that Merseburg process is a promising method for the consumption of (PG) as by–product as well as a minimizer for CO₂ emissions. This was done by the capture of carbon dioxide gas during the production of calcium carbonate which  reduce CO₂ emissions and impair further CO₂ gas release. The five products obtained were characterized physically and chemically using XRF, XRD, SEM, and EDX analysis. This study supports efficient, safe, environmentally friendly and High-Value materials from two problematic hazard waste posphogypsum (PG) and Carbon dioxide CO₂.