Bosnian people walk on the street during heavy smog in the northern Bosnian town of Tuzla, 140 kms. north of Sarajevo, on Tuesday, Dec. 17, 2013. Due to heavy fog and air pollution visibility reaching some 10 meters, medical officials urged people not to spend too much time outdoors, with particular warnings issued to those suffering from respiratory or heart diseases.

十二月十七日周二，波士尼亞北方的圖茲拉城鎮大霧瀰漫，居民走在街上幾乎伸手不見五指，該鎮位於首都塞拉耶佛北方一百四十公里處。由於大霧和空氣汙染，街上的能見度只有十公尺左右，醫護人員呼籲民眾別在戶外待太久，還特別針對有呼吸疾病或心血管疾病的患者發出警告。編譯／楊慧莉    圖／美聯社