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It’s going to take $2.5 trillion in spending over the next decade to get the U.S. on a path to a carbon-free economy, but the transition will help to pay for itself, Princeton University researchers say.

The president of the Organization of Petroleum Exporting Countries reiterated that the oil producers’ cartel shouldn’t rush to increase output early next year and said energy demand was still fragile with the coronavirus raging across parts of the world.

The average price of diesel increased by 3.3 cents a gallon nationwide to $2.559, according to weekly data released by the U.S. Energy Information Administration on Dec. 14. Still, trucking’s primary fuel costs 48.7 cents less than it did a year ago.

Toyota Motor Corp. unveiled a second-generation fuel cell system that is nearing the point when it could be offered to heavy-duty truck builders looking to build hydrogen-powered tractors.

Exxon Mobil Corp. announced several new emissions targets and said it would begin publishing pollution information related to customers’ use of its products for the first time, just days after activist investors criticized the oil giant for its environmental record.

DUBAI, United Arab Emirates — An oil tanker off Saudi Arabia’s port city of Jiddah suffered an explosion early Dec. 14 after being hit by “an external source,” a shipping company said.

Daimler Trucks North America announced its truck manufacturing plant in Portland, Ore., will be the first to achieve carbon-neutral production in the global Daimler Trucks network — meeting green production this year.

Oil just managed a weekly gain as an impasse in Washington over pandemic relief dimmed chances of an imminent boost to demand.

Recent advances in electric-­vehicle technology and the broader movement to reduce carbon emissions are creating market conditions that are increasingly favorable for electrification.

SAN RAMON, Calif. — General Motors’ self-driving car company is sending out vehicles with nobody behind the wheel in San Francisco as it navigates its way toward launching a robotic taxi service that would compete against Uber and Lyft in the hometown of the leading ride-hailing services.