CHINA
Hefei, China— People exercise in heavy smog in eastern China on January 3. Travelers across the country faced massive disruptions in air and road traffic as the country issued its first-ever national red alert for severe fog. Visibility fell below 60 yards, according to the South China Morning Post. Pollution alerts are common in northern China during the winter, when the need for heat soars and coal plants kick into overdrive to meet the demand, according to Reuters.