They weren't invited to speak at the summit because of national emissions.
This week, Mr. Guterres, a seasoned politician from Portugal now in his second and last term as the head of the United Nations, is trying a new diplomatic wink-and-nod tactic. He is hosting a summit on Wednesday at which countries that have accelerated their plans to phase out fossil fuels are being invited to speak, and only if they send cabinet-level or more senior leaders. To show that they take the summit seriously.