"I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to the earth."John F. Kennedy, thirty-fifth President of the United States.
That sort of leadership might be what the world needs for tackling climate change.
The leadership to do what needs to be done, and not make excuses. To set the sort of example that'd make the rest of the world follow.
It'd need a brave leader, but they'd be also taking the opportunity for them and their country to be heroes in the eyes of the world.
The more that the rest of the world drags its feet, and the bleaker the future comes to look, the greater the rewards for taking such leadership will become.
BTW, the text of JFK's speech can be found here.