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Truck maker Volvo AB said its sales for the first two months of the year fell 13%, as U.S. deliveries plunged following new emissions standards that boosted truck prices, Bloomberg reported Tuesday.

A funny thing happened just as some fleets were discussing reducing their fuel surcharges: Prices went flying again. Since Jan. 26, after five straight weekly increases, the average retail price of diesel is $2.626 a gallon, and climbing.

The Environmental Protection Agency has proposed for the first time sharp cuts in exhaust emissions from railroad locomotive and marine engines in a plan a spokesman said would “follow exactly the same pattern” as environmental regulations for truck engines.

Air cargo shipments rose 2.1% in January from a year earlier, with about an even split in gains in domestic and international shipments, the Air Transport Association said.

The average national price of diesel fuel jumped 7.5 cents to $2.626 a gallon, while gasoline soared 12.2 cents from last week to $2.505, the Department of Energy said Monday.

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.

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.

Forward Air Corp., a contractor to the air cargo industry, reported its fourth-quarter net income matched the previous year’s, at $12.2 million, while earnings per share climbed to 40 cents a share from 38 cents.