The legal system is supposed to be straightforward: you need action from somebody, you take them to court, and the court decides the case.
Unless the case is unusual and the people being sued insist the case is improper. Then it can take a long time just to get to trial.
And that may finally happen for the people who filed suit in federal court on behalf of children in Oregon, to force action on climate change from state government. A recent judge's ruling may clear the final hurdle for trial.
Law professor Mary Wood at the University of Oregon is a scholar writing about the case.
She visits once again to talk about recent developments, and what may lie ahead.