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Oil extended its retreat from a seven-year high, slipping back below $100 a barrel in London, as Russia’s invasion of Ukraine forced traders to grapple with a fluid market environment.

CHEYENNE, Wyo. — Four Rocky Mountain states will cooperate on developing ways to make the most abundant element in the universe, hydrogen, more available and useful as clean-burning fuel for cars, trucks and trains, the states’ governors announced Feb. 24.

Hyliion Holdings Corp. reported a fourth-quarter net loss and modest first-time revenue as its work on providing electrified powertrains for Class 8 trucks continued.

The national average price for diesel continued to climb, albeit at a slower rate, rising 3.6 cents to a nearly nine-year-high of $4.055 a gallon, according to Energy Information Administration data released Feb. 22.

American Trucking Associations’ Technology & Maintenance Council plans to focus its annual meeting on electrifying performance in maintenance management.

Nikola Corp. said it will start full-scale output of battery-electric trucks next month and deliver between 300 and 500 of the big rigs to customers this year. Its shares rose despite a slump in the broader market.

Oil surged above $105 a barrel for the first time since 2014 after Russia attacked sites across Ukraine, triggering fears of a disruption to energy exports at a time of already tight supplies.

DETROIT — Ford Motor Co. CEO Jim Farley says the automaker has no plans to spin off its electric vehicle or internal combustion businesses, but is reinventing itself by removing costs and ramping up for large-scale EV and software sales.

TravelCenters of America Inc. reported fourth-quarter net income soared and revenue nearly doubled.

Renewable Energy Group Inc., a green diesel maker, is exploring options after receiving takeover interest, including selling itself, according to a person familiar with the matter.