Forty world leaders are taking part in a climate change summit hosted by US President Joe Biden. Alice Hill, David M. Rubenstein Senior Fellow for Energy and the Environment at the Council on Foreign Relations, shared her thoughts on the meeting.

“If we want to leave our children, grandchildren and future generations a healthy planet, we’ve got to respond now to the challenge of climate change. “ – Robert Redford. From every part of our world, in our own way, we can do something to act on climate. But we need our world leaders to do the s

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

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...

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.

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.

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.

In the near future, the North Pole could truly be relegated to the realm of history. Since scientists started measuring winter sea ice, we’ve lost half a million square miles of it—and for every additional ton of carbon dioxide in the air, about 32 square feet of summer sea ice disappears. Robin

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.

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.