Leaders of the World Health Organization say they are concerned about the air quality and
health efiects on citizens during a recent outbreak of heavy pollution in Beijing．Still，they said they
were unsure of the exact amount the air pollution takes on any person’s body，casting doubts on
local reports tying the area’s dirty air to particular cases of illness．
Speaking at a briefing(情况介绍会)on Tuesday，the WHO’s Western Pacific regional director，
Shin Young—Soo，cited(列举)reports about poor air quality causing lung cancer in recent weeks.
“The WHO is skeptical of the information，”she said．“We’re cautious of whether the illness is related
to air po11ution. We know it has an impact on health，but we don’t know how much．”
