EV automaker Nikola has signed a memorandum of understanding with Opal Fuels to build and operate hydrogen fueling stations across North America. Under the preliminary agreement, the two companies will work to co-develop the technology necessary to accelerate the adoption of fuel-cell electric vehicles. They also plan to explore the use of renewable natural gas.Initially, they say they plan to focus on infrastructure for private shipping companies before looking at whether it makes sense to make something similar available to the public. To date, Opal has built more than 350 renewable natural gas stations.“Today marks another important step forward in Nikola’s stated energy infrastructure plans and its focus on providing hydrogen fueling services to customers,” said Pablo Koziner, the president of Nikola’s energy and commercial operations.The announcement comes just months after federal prosecutors indicted Nikola founder and former executive chairman Trevor Milton of fraud. Among othe