"Under the Dome", a smog documentary released by Chai Jinghas been viewed more than 17 million times on Youku and hasprovoked national discussion after going viral online.

柴静发布的“雾霾纪录片”《穹顶之下》在优酷上已播放超过1700万次，在网上迅速传播后引发了全国的热烈讨论。 

雾霾(smog)我们并不陌生，“雾霾记录片”可以用smogdocumentary 表示， 《穹顶之下》(Under the Dome)是柴静自费制作的雾霾纪录片(a self-funded documentary about smog)，这是一份调查性报道(investigative reporting )，通过国内外实地调查(field investigations at home andabroad)，采访了官员、科学家及普通民众，提供了大量数据.