Experts urge China to detail port emissions

China should establish emissions inventories for all major port cities as soon as possible to detail pollutants from ships and ports, experts have suggested.

They say these pollutants may account for as much as 20 percent of the cities' airborne pollutants and have also called for the diesel fuel standard for ships to be strengthened to reduce pollution.

Ding Yan, deputy head of the Environmental Protection Ministry's vehicle emissions control center, said pollutants generated by ships and the port in Hong Kong contributed to more than 50 percent of the region's airborne pollution.