This incorporates a safety factor of 1, 000 on the lowest observed adverse effect level of antinomy in animals--in other words, the first statistically significant health problem in animals came from inhaling antimony at a level of 9000 micrograms per meter cubed.

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"People get up every day and use a lot of different forms of transportation without thinking about the safety factor, and we don't want them to worry about the safety of the bus they ride on or the highway they drive on, " LaHood said.

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Such organisations, many people agree, are the most important factor in improving the safety of airlines.

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Safety is also a factor, of course, especially in the aftermath of the Sept. 11, 2001, terrorist attacks.

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He said the alteration of evidence by the police and other emergency services was also a supporting factor, along with stadium safety.

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He explained that the alteration of evidence by the police and other emergency services was also a supporting factor, along with stadium safety.

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