2019 was the second hottest year on record.
Globally, temperatures were more than 2°F (1.11°C) warmer than the late 19th Century.
During the northern summer, water pooled on top of the Greenland Ice Sheet as ice melted.
Large, intense fires burned from Alaska and Siberia to Australia.
This continues a long-term trend of warming around the world, driven by rising greenhouse gas levels.
The last decade was the warmest on record.
And the last five years have been the warmest five years on record.
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