In three decades of these meetings aimed at forging global consensus on how to prevent and deal with global warming, this will go down as among the most divisive.
Many countries were livid when COP30 in Belém, Brazil ended on Saturday with no mention of the fossil fuels that have heated up the atmosphere. Other nations - particularly those with most to gain from their continued production - felt vindicated.
The summit was a reality check on just how much global consensus has broken down over what to do about climate change.
Here are five key takeaways from what some have called the "COP of truth".
Brazil - not their finest hour
