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City officials believe the sinkhole outside Ms. Lewis's apartment may have been caused partly by excessive weight on unstable ground.
WSJ: Bottom Falls Out of Debt-Ridden City
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Do we really want two nuclear reactors of Chernobyl-like design, built in shoddy fashion, which all the defectors and observers say is happening, on seismically unstable ground, right off our shore?
CENTERFORSECURITYPOLICY: Steve Forbes at the inauguration of the Casey Institute
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The unstable nature of the ground dictated that houses were no higher than two storeys.
BBC: Country village charm in the heart of Paris
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Campaigners are worried the building work could lead to the ground becoming unstable.
BBC: Concern over homes to be built above Bristol caves
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With buildings were still unstable, with fires raging below ground of 2, 000 degrees or more, there was good reason for their concern.
CNN: Giuliani: 'Thank God that George Bush is our president'
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There is a risk of leaving an unstable or even disintegrated Iraq that might be a new breeding ground for anti-American terrorists.
ECONOMIST: Saddam's latest gambit | The
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Unstable means that if an imaginary balloon filled with air from near the ground were to be lifted upward, colliding with some weather feature such as a cold front, the "balloon" would become warmer than the surrounding air at that level.
CNN: The making of a nightmare tornado
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Water from the swollen River Exe has washed away the ground from underneath some of the nearby track, buckling rails and making the area unstable.
BBC: South West rail problems could last five days