Beijing, Tianjin and Hebei province are showing how they are using science and technology to address smog problems in their area.

A total of 170 science and technology research projects aimed at tackling the problem have been exhibited in Hebei since Friday.

Sponsored by the Ministry of Science and Technology and the governments of Beijing, Tianjin and Hebei, the exhibition is open to experts, businesspeople and the public until Aug 15. Admission is free.