Countries agreed to try to hold global warming to 1.5 degrees Celsius. Is that still possible?

An iceberg floats off the coast of Illulisat, Greenland. Ice sheets in Greenland and Antarctica are melting rapidly, and the risks of drastic melting increase as the Earth heats up. The melting of Greenland's ice sheet is the second-largest contributor to global sea-level rise. (The largest contributor is water expanding as it warms.)

The primary focus of international climate negotiations this week in Baku, Azerbaijan, is how to pay for the costs of cutting global climate pollution and adapt to the impacts of climate change.