The world's 20 richest countries will commit this weekend to tackling the existential threat of climate change, paving the way for more detailed action at a U.N. climate change summit next week, according to a draft communique.

Leaders of the Group of 20, who will gather for talks on Saturday and Sunday in Rome, will pledge to take urgent steps to reach the goal of limiting global warming to 1.5 degrees Celsius, according to the draft.

They will then head to Glasgow, Scotland, for a crucial United Nations gathering of almost 200 countries, known as COP26.