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LONG BEACH, Calif. — A panel representing the shipping industry spoke about the looming International Maritime Organization mandate that will require cargo vessels to burn low-sulfur diesel, and shippers and carriers said the requirements could lead to price increases or the rerouting of freight.

RALEIGH, N.C. — As trucks become more complex and high-tech, so, too, do the repairs and maintenance systems, experts said Sept. 18 at the fall meeting of American Trucking Associations’ Technology & Maintenance Council.

President Donald Trump said he will revoke California’s authority to regulate greenhouse gas emissions from autos, confirming a widely-anticipated move that will escalate the ongoing dispute between his administration and California.

The Trump administration will announce it is rescinding California’s authority to regulate greenhouse gas emissions from automobiles at an event at the EPA’s Washington headquarters Sept. 18, according to people familiar with the matter.

U.S. exporters are increasingly relying on trucks to get fuel into Mexico as the country’s gasoline production sags and infrastructure constraints limit shipments from one coast to the other.

Even while oil industry analysts are assessing the damage to Saudi Arabia’s oil field from an aerial attack Sept. 14, the nationwide price of diesel fuel climbed by 1.6 cents to $2.987 per gallon, according to the U.S. Department of Energy report Sept. 16.

U.S. pipeline giant Energy Transfer agreed to acquire rival operator SemGroup Corp. for about $1.35 billion in a stock and cash deal, building out billionaire Kelcy Warren’s empire even as investors demand financial discipline.

CANBERRA, Australia — Volkswagen has agreed to pay up to 127 million Australian dollars ($87 million) to settle an Australian class action stemming from the 2015 diesel emissions scandal, the German automaker and a lawyer said Sept. 16.

DUBAI, United Arab Emirates — Global energy prices spiked Sept. 16 after a weekend attack on key oil facilities in Saudi Arabia caused the worst disruption to world supplies on record, an assault for which President Donald Trump warned that the U.S. was “locked and loaded” to respond.

First there was derision. Then mockery turned into admiration. Now a battle is unfolding between the most revered names in the automobile world, Porsche and Tesla Inc., on one of the world’s most challenging racetracks.