New optimism on climate change

The Paris agreement on reducing greenhouse gas emissions has led to new hope that the worst effects of climate change may be avoided.

On this edition of Global Journalist, our guests analyze the climate agreement and discuss the prospects for keeping Earth's temperature from rising by 2 degrees Celsius, the point at which dramatic changes to the Earth are inescapable.

Joining us on this edition:

• Chris Anderson, assistant director of the climate science program at Iowa State University.
• David Doniger, director of the climate and clean air program at the Natural Resources Defense Council.
• Stephen Scharper, professor of anthropology and environmental ethics researcher at the University of Toronto.