Chlorine is not the only way to sterilize water. Ultraviolet sterilization is a chemical-free option suitable for many use cases: https://en.m.wikipedia.org/wik

Chlorine is not the only way to sterilize water. Ultraviolet sterilization is a chemical-free option suitable for many use cases: https://en.m.wikipedia.org/wiki/Ultraviolet_germicidal_irradiation https://en.m.wikipedia.org/wiki/Ultraviolet_germicidal_irrad...