As the warmest year ever recorded winds down, here are the key people and issues to watch as climate negotiators gather this week in Dubai for the U.N.'s COP28.
Iceberg "A23a," which is five times bigger than New York City, is heading towards the southern Atlantic Ocean after being stuck for almost four decades.
A23a, with an area of 1,500 square miles, has been stuck on the sea floor for nearly 40 years—but it's now on the move and about to drift into the Atlantic.