https://apnews.com/904979eaca7b3de6fd6c29176724b0ce

GLASGOW, Scotland (AP) — Officials from almost 200 nations worked through the night at the U.N. climate talks in Glasgow, trying to hammer out agreements on a range of tricky topics in time for a Friday deadline.

Among the outstanding issues was international carbon trading, a subject that has nagged at negotiators since the landmark Paris climate accord was sealed in 2015.