"Even if we don't have many points now, it's something to keep in mind for the future. Or we could talk other passengers into using theirs. It is for a good cause, and some people enjoy the feeling of being charitable."

She pauses as she considers. "It's more realistic than finding an effective source of sulfuric acid. Although, alternatively, we could use points on getting some of it. I'm not sure how feasible sulfuric acid production would be on board the train, we'd almost need a dedicated car for it." She could do it, though. With the equipment.