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.

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

Journalist Dahr Jamail & Professor Peter Wadhams say the resulting release of methane will lead to massive climate disruption, and that we have reached a point of no return.

It's a cautionary tale with a twist. Unless we do more to protect them, coral reefs could become extinct by 2050 due to pollution & climate change. This video was released just ahead of the landmark Copenhagen summit on climate change in order to draw attention to the plight of these fragile ecosyst...

‘Support’, a new sculpture by world renowned artist Lorenzo Quinn, was created to coincide with the opening of this year’s Venice Biennale International Art Exhibition. It is one of many art projects drawing attention to the impacts of climate change ahead of COP23, the upcoming UN Climate Change Co

President Obama delivers remarks at COP21 in Paris on the global community's need to address the threat of climate change. November 30, 2015.

An effort to restore mangroves is underway in Mexico's Yucatan peninsula with a group of women working to restore a vital ecosystem under threat from development and climate change.

The World is Watching Cities, Now More than Ever. The US withdrawal from the Paris Climate Accord brought cities into the spotlight. Because cities and mayors are acting now, and we must be right beside them as they become necessary leaders in this vital cause. As the world moves forward from Paris,...

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

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.