The ancient Greeks thought of fire one of several main elements during the universe, along with h2o, earth and air. This grouping would make intuitive sense: You could come to feel fire, just like you may truly feel earth, h2o and air. You can even see it and odor it, https://felixcsivj.p2blogs.com/35538813/an-unbiased-view-of-fire-resisting-ductwork-insulation