Danish firm Haldor Topsoe opened a catalytic converter plant in north China on Thursday, tapping into the country's growing market of environmental services.

At a cost of 91 million U.S. dollars, the plant in an economic zone in the coastal city Tianjin will make catalytic converters that clean exhaust from heavy duty diesel engines in trucks, buses and other vehicles.

"China is an important growth market for us and ... the production of advanced catalytic converters will ... support the ambitious environmental goals in the 13th five-year plan," said Haldor Topsoe CEO Bjerne S. Clausen.

Vehicle emissions are one of the biggest contributors to north China's perennial smog.

source : xinhua