SORU: paragrafta boş bırakılan yere uygun düşen cümleyi bulunuz
About seven out of ten fires are due to the hand of man, either accidental or deliberate, one to products and processes of materials, and the remaining two to defects in buildings. The most dangerous products in the home are plastics and rubber, which give off highly toxic fumes when burning. Video cassettes and foam-backed carpets are major culprits. -- ---.
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The number of fire deaths has shown a steady fall in recent years, but the risk of a blaze can never be ruled out |
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If a means of escape does not exist, these hot gases develop a pressure on the walls of the upper parts of the structure |
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When an opening is made to reach the fire, the admission of oxygen causes these gases to explode |
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Once air is heated, it becomes lighter, rises and seeks escape through any openings that may be available |
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Although the foam used in furniture is now treated so that it is less flammable, it still helps to spread the blaze |