A FAILURE by world leaders to agree radical proposals at Cop26 would be a crime against humanity, campaigners have said, as broadcaster Sir David Attenborough warned that future generations will ask whether sufficient progress was made at the climate conference.

Sir David, speaking at the opening ceremony, told world leaders that the planet is already in trouble, highlighting the climate injustice facing many across the global South. 

He said that while many discussions would take place over the coming days, in reality, only one number mattered — the amount of carbon in our atmosphere, and the need to keep global temperature rises to a minimum.