Atmospheric carbon dioxide levels continue to climb, averaging 400 parts per million for the month of February — the earliest in the year Earth has hit this global warming milestone on record.
This is the first time in at least 800,000 years, and possibly as long as 2 million, that atmospheric carbon dioxide levels have been this high.
The 10 warmest years on record globally have all happened since 1998, with 2014 on top as the warmest of all.
A look at how El Niño influences global weather patterns.
A graphical look at the top indicators of a warming world.
Record lows are outpacing record highs since last year. This is becoming rarer in a warming world.
The amount of carbon dioxide in the atmosphere has a strong correlation with rising temperatures.
If global warming continues unabated, only 6 of the 19 previous host cities could host the Winter Games again by the 2080s.