In China’s capital, they’re calling it the “airpocalypse,” with air pollution that’s literally off the charts. The air has been classified as hazardous to human health for a fifth consecutive day, at its worst hitting pollution levels 25 times that considered safe in the U.S. The entire city is blanketed in a thick grey smog that smells of coal and stings the eyes, leading to official warnings to stay inside.

Beijings Airpocalypse Spurs Pollution Controls, Public Pressure : NPR.