Summary: Diplomats and negotiators from nearly 200 countries struggled to reach a global accord on reducing emissions to ease the impact of climate change. Friday was scheduled to be the last day of the COP26 summit in Glasgow, Scotland. But deep disputes over financial aid, fossil fuels and future commitments suggest talks may go on into Saturday. William Brangham reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
