| 21. | Each time Ditka stepped on the field, there was the threat of spontaneous combustion.
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| 22. | Dispose of those cloths carefully; they can cause spontaneous combustion.
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| 23. | Fires occurred frequently due to spontaneous combustion of the coal.
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| 24. | It was a flashback for me, like the spontaneous combustion that we had then,
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| 25. | The nuclear version of spontaneous combustion is known as a " criticality accident ."
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| 26. | If it gets humid it can heat up and ferment, leading to spontaneous combustion.
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| 27. | Late last month, spontaneous combustion occurred in the rubbish.
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| 28. | What these two marquee teams produce is spontaneous combustion.
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| 29. | Gases were rarely a hazard, but spontaneous combustion of coal dust was a potential problem.
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| 30. | It's believed that the fire started as a result of spontaneous combustion in this area.
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