World leaders have set out competing positions and made clashing demands in two days of intense speech-making at the COP31 climate change talks in Turkey, leaving negotiators with a tough task to draft a meaningful deal that all can agree. (Corrects attribution in paragraph 18 and final paragraph to "she" from "he") By William James and Simon Jessop ANTALYA, Turkey, Nov 12 (Reuters) - World leaders have set out competing positions.