https://apnews.com/221cc6c5d64abd5cfff7c7394c71c93c

MADRID (AP) — Officials from almost 200 countries are preparing for a last push at an annual U.N. summit to finalize rules for the Paris climate accord amid signs that resolving the issue of international carbon markets may be postponed for another year.

Negotiators pored over revised drafts Friday, hours before the U.N. talks in Madrid were officially meant to end.