Fires begin when a flammable or a combustible material combine together with a sufficient amount of oxidizer for example oxygen gas or another oxygen-rich compound (even though non-oxygen oxidizers exist, including chlorine),[56] is subjected to a source of warmth or ambient temperature over the flash point for the gasoline/oxidizer mix, https://socialmediatotal.com/story4950266/fire-risk-assessor-carlisle-for-dummies