Is 828 gypsum powder environmentally friendly?

Environmental protection. Gypsum is a green building material. First, the raw materials for producing gypsum blocks are not toxic and harmful, but some waste residues, such as fly ash and slag, are added. Secondly, in the process of producing gypsum blocks, calcium sulfate dihydrate (CaSO4? 2H2O) removes three-quarters of the water and becomes calcium sulfate hemihydrate (CaSO4? 0.5H2O), its "waste gas" is water vapor, which will not have any impact on the environment.