Hebei and Tianjin have been frequently shrouded in smog consisting of airborne particulate pollutants since January.

Wisconsin Governor Scott Walker said he sees great potential for Wisconsin to share its experience on the issues of water resources and air quality.

Xia Guang, director of the policy research center for the environment and economy under the Ministry of Environmental Protection, said China is facing more pressure on water pollution, smog and greenhouse gases than many other countries.

"It is necessary to carry out a relatively strict industrial policy on the steel, cement and other high-polluting industries, encourage environmentally friendly industries, while learning from other places which have done a good job," he said.