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The Ontario Trucking Association said Tuesday that an apparent diesel fuel shortage in the province was causing concern to truckers.

Gasoline prices jumped almost 13 cents a gallon nationwide in the past two weeks, as the price of crude oil rose, according to the latest Lundberg Survey of filling stations, released Sunday.

UNIVERSAL CITY, Calif. — An official with the Chicago Climate Exchange said the demand for cleaner engines and alternative fuels in the United States will increase as membership in its cap-and-trade emission trading system expands.

UNIVERSAL CITY, Calif. — The president of the Long Beach Harbor Commission said a licensing system would be “up and running within five years” at his port and the neighboring Port of Los Angeles to ensure all trucks entering the facilities meet strict emission standards.

Crude oil closed at more than $60 a barrel for the first time this year Wednesday, while the Department of Energy reported Thursday that inventories of both gasoline and distillate fuel saw big decreases last week.

The average national retail price of diesel fuel rose 1.5 cents to $2.491 a gallon, the Energy Department reported Tuesday.

ARLINGTON, Va. — The new chairman of the Senate Finance Committee told directors of American Trucking Associations last week that he supported creation of federal financial incentives to help fleets purchase new, cleaner-burning diesel engines and auxiliary power units.

ARLINGTON, Va. — American Trucking Associations said last week it would become more vocal in its support for increased fuel efficiency in heavy trucks and ratified an agreement with the biodiesel industry to promote that fuel at the federal level.

Most major truck engine manufacturers said they are now testing prototypes of engines developed to meet the federal government’s 2010 diesel engine emission standards. Two of them said they will have engines available for testing next year.

For anyone who operates a commercial truck, there is little doubt about the importance of the vehicle’s fuel efficiency — especially in this era of historically high diesel and gasoline prices.