A working group of the World Health Organisation has proposed a set of draft new WHO air quality guidelines.
世界衞生组织的工作小组建议了一套新空气质素指引。
The 2005 WHO air quality guidelines (AQGs) are designed to offer global guidance on reducing the health impacts of air pollution.
2005年《世界卫生组织空气质量准则》旨在就减少空气污染对健康的影响提供全球性指导。
Particulate matter pollution is considered the biggest health risk. But the WHO Air Quality Guidelines also recommended lowering the daily allowed limits for ozone.
除了指出微粒物质的污染被视为最大的健康威胁外，WHO空气质量指南还推荐调低日均臭氧限值。
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