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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.

The Environmental Protection Agency said it would soon issue its guidance for engine manufacturers on the conditions they must meet in order to sell engines that use selective catalytic reduction to meet emission regulations.

As the trucking industry shifts to the next generation of low-emission diesel engines, some fleet maintenance managers said they have experienced few problems with the transition, which presents maintenance adjustments for heavy-duty and medium-duty trucks alike.

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

Retail diesel fuel’s national average price rose for a fourth straight week, jumping 6 cents to $2.551 a gallon, the Department of Energy said Monday.

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.