The health of city dwellers needs to be protected from rapid and unplanned urbanization, as well as environmental, demographic and technological changes.

在这种快速发生且未经筹划的城市化面前，以及面对环境、人口和技术方面的变化，城市居民的健康需要得到保护。

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Nancy Clark, assistant commissioner for environmental disease prevention at the New York City Health Department, said one suspect, a new ventilation system at the school, did not appear to be a cause.

纽约卫生署环境疾病防治助理处长Nancy Clark提到一个疑点，就是学校一个不引人瞩目的新通风系统。

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The WTC study was supported by the Centers for Disease Control and Prevention, the National Center for Environmental Health, and the New York City Department of Health and Mental Hygiene.

WTC研究是由疾病控制与预防中心、国家环境卫生中心和纽约市卫生局和精神卫生部赞助。

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Police and Oxford City Council environmental health officers have started patrolling on foot and by car for noisy gatherings.

BBC: 'Party patrols' begin in Oxford to tackle late night noise

The source of the outbreak was being investigated by the city council's environmental health department and the Health and Safety Executive.

BBC: Legionnaires' Disease bacteria

Just two hours before the blast at Pemex headquarters, the company touted its security record at a conference titled "First Congress for Security, Health and Environmental Protection" in the city of Merida in eastern Mexico.

WSJ: Deadly Blast Hits Mexico Oil Giant