China has ordered curbs on steel and aluminum output in as many as 28 northern cities during the winter heating season as it steps up its fight against pollution, according to people with knowledge of the matter. The cuts include halving steel capacity in four major cities, including top producer Tangshan in Hebei province, according to the people, who asked not to be identified because the matter is confidential.

China has ordered curbs on steel and aluminum output in as many as 28 northern cities during the winter heating season as it steps up its fight against pollution, according to people with knowledge of the matter. The cuts include halving steel capacity in four major cities, including top producer Tangshan in Hebei province, according to the people, who asked not to be identified because the matter is confidential.