While previously aknowledging that we have a climate emergency, this is the first time Antonio Guterres has called for all Government leaders to declare a climate emergency.
The pandemic has cancelled this years UN climate change conference - COP26 - scheduled for Glasgow December 2020. But an online conference of leaders was organised to mark the 5th anniversary of the Paris Agreement: the Climate Ambition Summit.
Antonio Guiterres told the summit: "I call on leaders worldwide to declare a State of Climate Emergency in their countries until carbon neutrality is reached.
"Five years after the Paris Agreement, we are still not going in the right direction.
"Let’s make the promise of a net zero world a reality."