A United Nations report warns that climate change and global warming are threatening the world's food supply. CNN's Bill Weir travels to Iowa to see how some American farmer's unusual and innovative measures to continue to grow food as they grapple with lower crop yields.

The Intergovernmental Panel on Climate Change has published a report on climate change and the impact it has on remote low lying Pacific Island communities. The Marshall Islands is made up of 29 low lying coral atolls and they are disappearing.

Millions of people are facing a long, difficult road to recovery after Irma’s week-long deadly rampage through the Caribbean and southeastern United States.

Climate Change is a Reality!

Countries from around the world will meet in a few weeks to try to reach agreement on limiting greenhouse gasses. Previous climate summits have been fraught with disagreement. Will the Paris meeting produce results? Jeffrey Brown speaks to UN climate chief Christiana Figueres about what to expect.

Katharine Hayhoe, a co-author of the current Assessment (November, 2018) and director of the Climate Science Center at Texas Tech University, said in a Friday tweet that the White House’s claim is “demonstrably false.” The 1,600-page report, which was issued by 13 federal agencies and authored by

Harvey’s drenching rains are moving east after days over the Houston area. Which means that in America’s fourth-largest city, floodwaters have begun to creep down—offering a first look at the storm’s real legacy of destruction.

The World is Watching Cities, Now More than Ever
COP21 brought cities into the spotlight. C40 is proud to help shine that light a little brighter. Because cities and mayors are acting now, and we're right beside them as they become necessary leaders in this vital cause.Watch the mayors of Bogotá, C

President Barack Obama addressed the United Nations on climate change at the UN Climate Change Summit on September 23, 2014 in New York.

Hundreds of thousands of demonstrators from around the world united to urge policy makers to take action on climate change ahead of an upcoming meeting at the United Nation on September 23, 2014.