HARDtalk - Dr Gerd Leipold, Executive Director of Greenpeace international

When it comes to environmental campaigning Greenpeace is a brand with global reach; it claims millions of supporters and an annual income of more than two hundred million dollars. But does it use its money and its influence wisely? Dr Gerd Leipold is the outgoing executive director of Greenpeace International. Stephen Sackur puts it to him that confrontational campaigning may not be the best way to win the argument over climate change.