The carbon during the char brings together with oxygen also, and this is a Considerably slower reaction. That is definitely why charcoal inside a BBQ can continue to be very hot for some time. Most common amongst prehistoric and afterwards primitive peoples will be the friction system of producing fire. https://fireratedductworthinsulat01233.kylieblog.com/37108985/a-secret-weapon-for-fire-rated-ductworth-insulation