Halons
Inhibitory factors for halons are in low percentages, trouble is CBM was less than 4 percent in air but very poisonous. Older guys will remember CTC! Better ones only need 5.2% in air whereas CO2 may require 30 to 70 percent depending on risk and needs a warning above 4 percent concentartion to avoid suffocation. I hope they will see their deluded thinking will potentially be a greater risk than any to the ozone layer. We should protest very strongly by all means possible. ( I may be a bit behind the times now as a lowly CPL but was in UK fire service for 20+ years and in terms of an operational and dynamic risk assessment I could only recommend Halon for aircrew - I stand by to be educated!)