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.

16 climate activists teens and children are petitioning the United Nations with claims that the boy is violating children's rights by not taking action on climate change and global warming. Global climate strike leader Greta Thunberg is among the activists taking climate action against the UN. Thunb...

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.

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

United Nations chief Antonio Guterres says a major new report on climate change is a "survival guide for humanity". Clean energy and technology can be exploited to avoid the growing climate disaster, the report says. But at a meeting in Switzerland to agree their findings, climate scientists warne...

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

There is overwhelming evidence that humans are experiencing the effects of climate change, says a new report. Unless serious action is taken, this is likely to get worse, with growing risks of floods, food shortages, and threats to human health, warns the United Nation's Intergovernmental Panel on C...

Copenhagen has announced ambitious plans to become the world’s first carbon-neutral capital by 2025. This is how they plan to achieve their goal. For more information on The B1M: http://ow.ly/GxW7y

United Nations - Statement by Mr. Leonardo DiCaprio, UN Messenger of Peace with a special focus on climate change, at the opening of the Climate Summit 2014.

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