In the winter of 2013, Beijing and other cities in the East China Plains became blanketed in thick, eye-stinging, gray smog....News articles at the time attributed the so-called “airpocalypse” to China’s heavy coal emissions. But that’s only part of the story, according to a new study published in Science Advances....“This is the first study that shows that climate changes in the high Arctic had a significant effect in winter haze in China,” says study co-author Yuhang Wang, a professor in Georgia Tech’s School of Earth and Atmospheric Sciences.