I chaired Cop21 when we delivered the Paris agreement. We must go further in Glasgow | Laurent Fabius

This is no time for climate fatalism. We need science, societies and states to be in alignment for our crucial next steps

In the fight against global warming, the 2015 Cop21 meeting that yielded the Paris agreement has become the landmark Cop. Glasgow Cop26 must be an accelerator of action.

As the French foreign minister at the time I chaired that conference, and I am often asked about the secret of the universal agreement we achieved there. My answer is that the success in Paris was made possible by a strong process of environmental diplomacy that required the alignment of three planets": science, societies and states.

Laurent Fabius, a former prime minister of France, was chair of Cop21