Scottish First Minister Nicola Sturgeon became the first world leader to declare a "climate emergency" on Sunday.
The Scottish leader told delegates to a party conference in Edinburgh she was inspired after meeting young climate activists.
Ms. Sturgeon said: "A few weeks ago, I met some of the young climate change campaigners who've gone on strike from school to raise awareness of their cause. They want governments around the world to declare a climate emergency. They say that's what the science tells us. And they are right."