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An Environmental Protection Agency advisory board is reviewing the quality and relevance of scientific and technical information used to justify repealing an Obama administration regulation that limits the production of glider trucks.

Volkswagen AG will pay a $1.2 billion fine ($1 billion euro) imposed by German prosecutors for cheating to get around diesel-emissions regulations, closing one chapter in a three-year-old crisis even as new developments arise.

Kenan Advantage Group Inc. announced it merged its two merchant gas subsidiaries — Jack B. Kelley and Cryogenic Transportation — into KAG Merchant Gas Group.

Nikola Motor Co. is starting the hiring process to staff its new Arizona research and development center, slated to open in November.

Clean Energy Fuels Corp. shareholders approved the purchase of 50.8 million shares of common stock by Total Marketing Services S.A., a wholly owned subsidiary of oil and gas company Total S.A., for gross proceeds of $83.4 million.

The U.S. average retail price of diesel fuel fell 1.9 cents to $3.266 a gallon, following a .3 cent decline a week ago, according to the weekly report from the U.S. Department of Energy’s Energy Information Administration on June 11. Despite the drop, diesel now costs 74.2 cents more per gallon than it did one year ago.

A Starship landed in Jacksonville, Fla. But there were no aliens on board, just 40,000 pounds of reef-building material hauled cross-country in an experimental lightweight truck with streamlining everywhere.

A Canadian startup is testing a system that sucks carbon dioxide from the air and converts it into fuel for cars and other vehicles.

PORTLAND, Ore. — Freightliner Trucks introduced the first all-electric versions of its heavy-duty Cascadia and medium-duty M2 models here, a major step toward bringing a full lineup of electric trucks to the North American market.

For the first time in 11 weeks the U.S. average retail price of diesel decreased, dropping by .3 cent to $3.285, according to the U.S. Department of Energy’s Energy Information Administration report June 4.