GENEVA, Oct. 19 -- Governments have written health into their climate plans. Few have said what it will cost, and fewer still how much of the bill they will pay themselves.

That is the finding of a World Health Organization review published on October 19. It read 114 national climate plans filed under the Paris Agreement, covering 140 Parties because the European Union's single plan speaks for its 27 members. Of those, 128 Parties, or 91%, mention health. Only four of the 82 that claim health gains from cutting emissions quantify or monitor them.

The gap between mention and money is the story. Just 23% of Parties, 32 in all, estimate what their health measures will cost. Only 7%, or 10, say any of the funding is unconditional, meaning i...