Chai Jing released an online documentary Saturday about air pollution. After the film was viewed some 100 million times, government censors stepped in to tamp down discussion about the film. Above, Ms. Chai is seen in a file photo from 2012 at her book release in Beijing Photo: Zuma Press BEIJING—A deeply emotive documentary on air pollution by a well-known journalist was quickly praised by a top government official, but after it drew some 100 million views online over the weekend, censors stepped in to tamp down the buzz, according to several accounts. Produced by former state television broadcaster Chai Jing, “Under the Dome” is a bleak look at the state of the Middle Kingdom’s skies and an unhappy commentary on how government efforts to target the problem have failed. Ms. Chai decided to investigate pollution after the birth of her daughter, who was diagnosed with a benign […]