Urgent climate action is social justice imperative: Pope

Pope Francis has issued an historic document to the world's Catholic bishops, calling for urgent action to combat climate change. It is the first time a pontiff has issued what's called an Encyclical specifically dedicated to the environment. The Pope has blamed human greed and consumerism, but also business and politicians for causing climate change. While the document has been welcomed by environmental activists, it has attracted criticism from climate change sceptics. Michael Kenny reports.

Urgent climate action is social justice imperative: Pope