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Oil surrendered an early gain July 19 as Tehran denied President Donald Trump’s claim that the U.S. downed an Iranian drone near the Strait of Hormuz, an assertion which had earlier helped oil snap back from four days of losses.

Some industry representatives suggest that electric-powered vehicles will not only reduce diesel pollutants, but also ­attract a new generation of recruits to the field of heavy truck maintenance.

Infrastructure policy, which was seen as a bright legislative point at the start of the year capable of reaching President Donald Trump’s desk, is now hardly mentioned by the president and leaders on Capitol Hill.

In the absence of a strong federal partner, states clamoring for infrastructure funds have taken financing measures into their own hands.

WASHINGTON — Federal policymakers crafting comprehensive transportation legislation should consider enhancing investments in low-emissions technologies across the freight sector, an executive with Cummins Inc. told a congressional panel July 16.

Trailer makers intending to sell their products in California beginning Jan. 1 must certify beforehand that the equipment meets the state’s Phase 2 greenhouse gas rule and receive an executive order, according to the California Air Resources Board.

The almost relentless thrust that has doubled crude output from the Permian Basin in three years is showing some signs of waning.

The U.S. average retail price of diesel dropped by 0.4 cent to $3.051 a gallon, the Department of Energy reported July 15. Meanwhile, crude oil slid to less than $59 a barrel during trading of West Texas Intermediate.

Chevron Corp. is seeking approval to modify its plans for a liquefied natural gas export facility on Canada’s Pacific Coast to an all-electric design that it says will result in the lowest greenhouse-gas emissions per ton of LNG of any large project in the world.

Clean Energy Fuels Corp. opened its newest natural gas fueling station in Hunts Point — the first station in New York City to exclusively offer renewable natural gas for medium- and heavy-duty vehicle fleets.