一位国际学生发email给我，传过来一张截图，发生在11月10日。查到网站：http://www.dailymail.co.uk/news/article-2828960/Locals-told-stay-inside-mysterious-noxious-fog-swamps-Moscow.html

上面有好几张照片和录像。莫斯科也发生了类似“雾霾”的空气污染问题？

文字说：“臭鸡蛋云？”

People in Russian capital Moscow were today urged to stay indoors after an acrid cloud smelling of rotten eggs engulfed the city.
The air 'reeked of sulphide' including over Red Square but experts said they were struggling to understand its source or cause.
One unconfirmed theory was that an industrial plant had leaked a cloud of Styrene over Moscow.
A housewife posted this shocking video from her high rise apartment block, stating: 'This is the horror we are witnessing today.

说是有“臭鸡蛋”气味，可能和硫化氢有关？但照片更像雾，少像霾。

硫化氢常和天然气应用相关；但文中又说可能有一家厂泄漏了苯乙烯，照片感觉不大像。原因在追查中。。。