Watch Beijing’s smog in terrifying timelapse

Beijing’s smog is known the world over as deadly. The government even uses a colored alert system to tell people how bad it is on any particular day, with a red alert being the highest. Of course, the thing is it’s tough to understand just how bad it can get until you see it in action.

That’s why this video of Beijing’s smog on a red alert day is worth checking out. You can get a real sense of how horrifying it really is once you see it in action.