BEIJING, CHINA - While many across the world are on high alert in wake of terrorist attacks, Beijing is under a red alert. It's not a bomb scare, but an air scare.
The pollution level is so high, the Beijing government shut down schools and some businesses including factories contributing to the hazy problem.
It's the first time in Beijing history a red alert has been issued. A time-lapse video from April 2015 to December 2015 shows the city gradually being covered in pollution.
In some areas, smog reached as much as 40 times the safe level, which doctors say pose a serious increased health risk.
"Asthma, chronic obstructed airways disease, and even things like heart attacks because the pollution can trigger that as well," says Dr. Tristan Evely, Medical Director of International SOS.
The approximate 20 million residents in China's capital will have to breathe slowly. All this is expected to last a couple more days as the wind picks up and hopefully clears the air.