- Study: Hydrogen fuel-cell opportunity window has passed for cars, diminished for trucks. Improvements to the range and charging capability of battery-electric vehicles have cancelled out the main selling points of fuel-cell vehicles. Policymakers should now focus focus all efforts on promoting EVs. https://www.greencarreports.com/news/1135053_study-hydrogen-fuel-cell-opportunity-window-has-passed-for-cars-diminished-for-trucks 99 comments energy