There are rows of harsh neon lights overhead and little or no ventilation.

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The men had been detained in a room with no ventilation, even though the average temperature in the city at this time of the year is higher than 38C, it added.

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Poorly constructed ones contribute to a nexus of problems: the spread of disease (because they have no proper sanitation or ventilation), the perpetuation of poverty (because children have no proper lights to study by) and the general sense of insecurity (because they are so flimsy and flammable).

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And if the air feels a little fresher at Kohl's, that's because newer buildings feature fresh-air ventilation and no smoking within 25 feet of the entrance.

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While the research could help inform practices in older NHS buildings, many newer UK hospital buildings feature no opening windows and complex computer-controlled ventilation systems.

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Another medic, the senior resident doctor who tried to revive the infant, said she appeared to be so "deeply unconscious" there was no need to sedate her before putting her on a ventilation machine to keep her breathing.

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