Hebei said it is fighting air pollution by pushing government officials to fulfill their duties and expanding its supervision of polluters to all villages in the province.

The province's disciplinary watchdog said on Monday that 201 officials have been investigated for 40 environmental pollution cases last year. Among them, 25 were county heads or government department leaders.

The officials were given administrative punishments, including being removed from their positions, said the Communist Party of China Hebei Provincial Commission for Discipline Inspection.