The United Nations climate summit, known as COP30, will wrap up later this week, and its achievements will likely be more muted this year. Delegates from nearly 200 countries are meeting near the Amazon rainforest, but the Trump administration decided not to send anyone. As part of our Tipping Point series, William Brangham discussed more with former Secretary of State John Kerry.Read More
As U.S. skips climate summit, John Kerry says absence undermines global cooperation
