I’ve seen more than a few documentaries in recent years addressing vital environmental issues, chief among them climate change, and they all have one thing in common: they’re terrifying. Not just for what they show of the damage that humankind has done and is doing to its only home, but also for the limited options (if any) that these films present to counter that damage. Last year’s “The Age of Consequences” in particular was real doomsday nightmare fuel.

So it’s commendable that someone has tried to make a film about hope, and not pie-in-the-sky hope, either. “Inventing Tomorrow” takes a personal look at some scientists — not of the accredited adult variety but teenagers, international students working on projects to make things better. They are “the people who can fix it, and who are going to fix it,” one of them says at the film’s opening.