After a little research, there are no real chemicals that can damage the environment itself. The main environmental issues are the large uses of water and energy. For most snow makers it takes 74,600 gallons to cover a 200ft by 200 area with 6 inches of snow. However, much more efficient tech is being created to reduce this amount of water. Also an extremely large amount of energy is necessary to power all of this so it’s a little counterintuitive to burn fossil fuels for energy to make snow when that energy production is just contributing to the problem. Lastly the water necessary often comes from streams lakes or reservoirs which can damage aquatic life especially in the fall during trout spawning, but usually this water just ends up back in the lakes and streams.