The UN's top court on Wednesday ruled climate change an "existential problem of planetary proportions" and said countries had a legal duty to act or face consequences.

The ICJ issued an opinion on climate change that stated the obligations of the Paris Agreement come with legal liability. A concern raised by Trump as early as 2017.

One of the world’s most vulnerable countries to the fallout from climate change has won a landmark legal battle, giving countries new ammunition to pursue some of the planet’s biggest emitters.