The capital of Norway is working to be nearly emission-free by 2030. Every year, the city of Oslo calculates how much emission-producing activity will contribute to greenhouse gases, then implements a carbon budget to keep those levels low. Lisa Desjardins speaks with Heidi Sørensen, director of Oslo's Agency for Climate, to learn more. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

In our news wrap Saturday, COP27 climate talks inched closer to a deal to create a disaster fund for vulnerable nations, FIFA's head scolded critics of World Cup host Qatar, APEC wrapped up meetings in Bangkok, heavy snow fell in western New York, Trump called the appointment of a special counsel an "abuse of power," and President Biden attended his granddaughter's wedding at the White House. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

U.S. and Chinese climate negotiators met formally for the first time in months at the COP27 global climate summit. Beijing had blocked bilateral climate discussions back in August, but they resumed after President Biden's meeting earlier this week with Chinese President Xi. Nick Schifrin reports on the collaboration and China's outsized impact on climate change. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

Up and down the Mississippi River basin, below-average rainfall has constricted one of the country's major economic thoroughfares. Some areas along the river are reporting their lowest water levels in decades and it could affect consumers across the country. William Brangham reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

For the first time in half a century, NASA is starting to make its way back to a lunar landing. The Artemis rocket was finally able to launch early Wednesday morning after prior delays, sending an unmanned capsule around the moon. At the same time, there are plenty of questions about the path NASA has chosen to make this happen. Miles O'Brien reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

For 27 years, the United Nations has held annual gatherings of world leaders to discuss how to combat climate change. Yet progress towards the goal of stopping global warming has been elusive, and this year's summit is happening against the backdrop of host country Egypt's record of human rights abuses. Sarah Kaplan, climate reporter for the Washington Post, joins Ali Rogin to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

The fate of the rapidly disappearing Amazon rainforest is in new hands after Brazil's latest election. President-elect Luiz Inácio Lula da Silva made fighting the climate crisis and protecting the Amazon a cornerstone of his campaign. Michael Mann, director of the Center for Science, Sustainability and the Media at the University of Pennsylvania, joins Geoff Bennett to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

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

In our news wrap Sunday, Biden, Obama and Trump campaigned in Pennsylvania with just two days until the midterms, delegates gathered in Egypt today for the opening of the United Nations COP27 climate summit, the Houston Astros clinched their second World Series title after defeating the Philadelphia Phillies, and the Powerball jackpot has grown to $1.9 billion with no winner yet. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

This weekend, nearly all of us will set our clocks back one hour. It's part of the twice-a-year ritual of alternating between daylight saving time and standard time. William Brangham looks at the history of changing the clock and a movement to do away with this process, once and for all. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders