BEIJING, CHINA - MARCH 15: (EDITORS NOTE: Image made with smartphone camera) The CCTV building and the Central Business District is seen shrouded in air pollution during a sandstorm on March 15, 2021 in Beijing, China. China's capital and the northern part of the country was hit with a sandstorm Monday, sending air quality indexes of PM 2.5 and PM 10 ratings into the thousands and cancelling flights. Winds that arrived early Tuesday cleared the air leaving blue skies. (Photo by Kevin Frayer/Getty Images)