Smog Journeys follows two families in China's north-east - one in a poor, rural setting, the other a middle-class family from Beijing.
What they both have in common is smog - one of the biggest environmental and health problems for a rapidly industrialising country.
The characters are meant to show how no one gets to be different when it comes to smog, no matter what jobs we do, it is still a problem we all face.
I wanted to raise the society’s environmental awareness through this, get people to pay attention to the issue of smog, and find ways to solve it.
- Jia Zhangke, director
This haunting short film by director Jia Zhangke, whose previous film A Touch of Sin was banned by Chinese censors, was created for Greenpeace.
Smog is becoming an increasingly political problem for China's ruling elite - with estimates that up to 500,000 people die prematurely from air pollution, citizens are becoming more conscious of the smog and more willing to protest.
In an accompanying interview with Greenpeace, Jia explains his motivations for making the film: