The heavily polluted cluster of Beijing, Tianjin and Hebei province signed a cooperation framework on Thursday to control air, water and soil pollution, marking a breakthrough in regional integration, according to a statement released by the Beijing Municipal Environmental Protection Bureau.

The move set up a new joint coordination system to curb serious smog, and included a plan to create the first unified regulation on the control and prevention of environmental pollution in the region as a whole - including plans for the management of industries likely to affect air, water, soil and solid waste, said Li Lixin, head of the bureau's regional cooperation department.

In addition, the trilateral region will develop standards for emissions. Beijing currently has stricter standards than Hebei and Tianjin for emissions in major polluting industries and for vehicle exhaust.