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In the debate over climate change, the heaviest polluters — think: power plants, trucks and cars — get the most attention from policymakers. New research suggests a broader view might be called for.

LAS VEGAS — Peterbilt Motors Co. has unveiled an all-electric medium-duty truck, adding a third model to its emerging electric-vehicle lineup.

Drillers in the Eagle Ford, a Texas shale oil patch, likely will scale back activity in 2019 as lower crude prices eat into cash flows, according to consulting firm Rystad Energy AS.

Oil extended its longest run of daily gains in 17 months on renewed efforts by the U.S. and China to reach a trade deal, and expectations the market will be tightened by OPEC’s output cuts.

The U.S. average retail price of diesel dropped 3.5 cents to $3.013 a gallon, the U.S. Energy Information Administration reported Jan. 7, even as crude oil prices saw renewed vigor and broached the mark of $50 per barrel.

LAS VEGAS — Daimler Trucks North America announced SAE Level 2 automated driving will be available beginning in July on its flagship Freightliner Cascadia model, calling it an industry first.

Oil headed for its longest stretch of daily gains in more than 17 months as the U.S. Federal Reserve sought to ease investor concerns, China moved to stimulate its economy and OPEC production cutbacks took effect.

Infrastructure and trade loom large for trucking in the year ahead as freight carriers adjust to a slower, but still positive, rate of economic growth in 2019, according to industry experts interviewed by Transport Topics.

The projected $2.70 a gallon pump price for 2019 is 3 cents lower than 2018 levels, although this year’s high could reach $3 as soon as May and top $4 in some cities, according to GasBuddy’s Price Fuel Outlook. The lower prices have not escaped Trump’s attention, who equated them to a tax cut in a tweet Jan. 1.

The U.S. average retail price of diesel dropped 2.9 cents to $3.048 a gallon, the U.S. Energy Information Administration reported, as crude oil prices hovered around $45 per barrel.