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California’s South Coast Air Quality Management District is offering incentive funding of up to $50,000 for the purchase of a diesel truck or up to $100,000 for the purchase of a natural gas truck, in return for scrapping an older Class 8 diesel truck, the agency said.

UPS Inc. said that it opened its C$30 million Calgary, Alberta, truck and air hub on Feb. 22, completing a consolidation project begun in June 2008.

The Environmental Protection Agency has not yet said how it intends to require heavy trucks to curb greenhouse gas emissions, but a report on the agency’s Web site projects that an advanced notice of rulemaking could be posted as early as June.

Clean Energy Fuels Corp. said Tuesday it will expand its network of liquefied natural gas stations in southern California in large cities and along major truck routes, with a goal to expand into the Southwest.

The California Air Resources Board has launched a $20 million funding assistance program to stimulate the purchase of hybrid trucks and buses.

The Obama administration last week issued its proposed new fuel efficiency and first-ever national greenhouse gases reduction standards for passenger cars and light trucks.

LOUISVILLE, Ky. — Truck and engine makers took advantage of one of the last major marketing forums before the onset of new federal emission rules to starkly set the stage for buyers of heavy-duty vehicles in choosing between SCR and EGR for their diesel engines.

Truck and engine maker Navistar Inc. said it will take a “leadership role” in trying to convince Congress and the new administration to delay full implementation of 2010 heavy-duty truck engine emission mandates.

A federal judge last week denied American Trucking Associations’ request for a preliminary injunction against controversial portions of emission-reduction programs at the California ports of Los Angeles and Long Beach.