Summary: President Biden arrived in Egypt for the COP27 U.N. climate talks. The president pledged new money for renewable energy projects around the world, and a greater push to cut emissions of methane. But he also is hearing a plea from the developing nations that are suffering the worst damage from climate change. William Brangham reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
