Actually, I was trying to prevent trolls like you from finding fault in my post. Trolls look for flaws in arguments and then try to hit you over the head with them.

I recall reading that Russia supervised the removal and destruction of Syrian chemical weapons stockpiles. I read that the rebels captured some stockpiles and that ISIS has used chlorine. I would not put it past other groups to use CW if they had them.

I have also read about the toxic fumes given off by many consumer products when burnt and about the toxic fumes from detonation of explosive substances.

I suggest that you look up these subjects yourself. It should be required  reading, particularly about consumer products that might poison us if ignited.