No matter whether it's an endearing blue sky or a hazardous haze, he posts the picture on social media along with the air quality index. "I want the pictures to speak for me," Zou told CNN. He's assembled each year of images into a single composite, an at-a-glance record of Beijing's smog problem. "I do think that our government should do more, but people in our society also need to contribute. They need to be aware of the pollution and participate in the monitoring and improvement of air quality," Zou said. Storm of discussion Beijing, like much of northern China, is struggling to tackle dangerously high levels of smog. In 2015, the city saw 46 days of "heavy air pollution," according to state