a noble gas - chlorine gas mixture having broad - spectrum effectiveness against bacteria , viruses , mold , fungi , algae including spore forming microorganisms , termites , roaches , mice and other organisms . the noble gas , preferably argon / chlorine gas mixture is introduced into an enclosed area where the bacteria , virus , mold , fungi , etc ., are found and allowed to remain so that the gas composition can penetrate completely into the space including cracks and crevices . after the remediation is complete , the enclosed space should be ventilated or air movement increased to disperse the remaining gas composition .