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NASHVILLE, Tenn. — Cummins Inc. said it will not use selective catalytic reduction for its 2010 heavy-duty engines, making it the first manufacturer to reject the urea-based system widely used in Europe to cut emissions.

Tire wear and tear is inevitable, but carriers can minimize its effects by choosing high-quality materials and being rigorous about maintenance and checking correct air pressures, several fleet maintenance chiefs and tire manufacturers say.

American Trucking Associations and the Canadian Trucking Alliance Tuesday urged state and provincial governments to revise their fuel tax systems to encourage truckers to use truck idling reduction technology.

Class 8 truck makers said they are offering electronically controlled air disc brakes as an option in 2007 models, promoting them as safer and easier to maintain than the drum brakes most U.S. heavy trucks use.

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.

Components maker ArvinMeritor Inc. said Friday it plans to sell its emissions technologies business to a private equity firm for $310 million.

LAS VEGAS — Leading heavy-duty truck components manufacturers said technology exists today to build a safer, environmentally friendly and low-cost heavy-duty “world truck,” but major obstacles are consumer acceptance and the lack of a single global standard for emissions and safety technology.

The maintenance managers of two vehicle leasing companies expect few problems in their shops as the truck-operating industry shifts to the next generation of lower-emission diesel engines.