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.

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

Since 2008, Chicago has been implementing a series of strategies in its Climate Action Plan – an initiative that seeks to reduce the city’s greenhouse gas emissions by 80% below 1990 levels – and in 2019 committed to running the city on 100% renewable energy by 2040.

The future of sea travel could be here -- and it just might help save the planet. A hydrogen-powered ferry that produces zero emissions will soon launch in the San Francisco bay.

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.

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...

Exxon research scientists warned about the effects of fossil fuels as early as 1977. Exxon has known about climate change for almost 40 years, despite its efforts to continue to promote fossil fuels and deny its existence throughout the 1990s as a leader of the Global Climate Coalition.

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...

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