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Plans by the Chinese government to close factories in and around Beijing and Shanghai this summer to reduce air pollution for the 2008 Summer Olympics could cause early or late peak seasonal surges in exports to the United States, shipping industry executives and transportation experts said.

As I understand the new driver-training rules, they indicate that a company cannot hire drivers if that company has a school for training those drivers. This is in conflict with every training institution in the country — if not the world.

Clean Diesel Technologies said Tuesday it has licensed its wire mesh filter technology to Headway Machinery Co. Ltd., the largest commercial diesel engine exhaust company in China.

Diesel engine maker Cummins Inc. said Tuesday it opened its first fuel systems manufacturing site outside of North America, the Cummins Fuel Systems Wuhan plant, in China.

As we move closer to the next federal mandate on emissions — which comes into force for 2010-model heavy-duty trucks — proponents of the two competing technologies are beginning to publicly argue over the superiority of their choices.

The U.S. Environmental Protection Agency said it is making available almost $50 million in grants to establish clean diesel projects aimed at reducing emissions from the nation’s existing fleet of diesel engines.

LOUISVILLE, Ky. — As competing engine makers continued their public battle over the best technology for meeting 2010 federal emission standards, analysts said the outcome of the competition could dramatically transform the industry.