The current level of biodiversity loss is extraordinary in human history: The global rate of species extinction is at least tens to hundreds of times higher than the average over the past 10 million years. At the end of 2022, countries around the world came together in Montreal for an agreement akin to the Paris climate accord to tackle the biodiversity crisis. Here’s more on the effort and how it seeks to confront the problem. Guest: Catrin Einhorn, who reports on biodiversity and climate for The New York Times.