United Nations Secretary General Antonio Guterres told countries gathered at the start of the COP27 summit in Egypt on Monday they face a stark choice: work together now to cut emissions or condemn future generations to climate catastrophe.

The speech was intended to set an urgent tone as governments sit down for two weeks of talks on how to avert the worst impacts of climate change, even as they are distracted by Russia’s war in Ukraine, rampant consumer inflation and energy shortages.