“…If one of the five elements is missing the explosion cannot occur. Combustible dust explosion hazards exist in a variety of industries including: agriculture, chemicals, food (eg: candy sugar, spice, starch, flour, feed and many others) grain, fertilizer, tobacco, plastics, wood, forest, paper, pulp, rubber, textiles, metal processing, coal and pharmaceuticals of course [1][2][3][4][5][6][7].…”