Dome effect leaves Chinese megacities under thick haze
Soot traps pollution and worsens air quality
![Shanghai](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/04/041616_notebook_say-what_free.jpg?fit=860%2C460&ssl=1)
UNDER THE DOME Atmospheric changes brought on by airborne black carbon may worsen air quality around China’s megacities, such as Shanghai (shown here).
Morgennebel/Flickr (CC BY-NC 2.0)