Here is Carl Wunsch, professor of physical oceanography at the Massachusetts Institute of Technology, on his treatment at the hands of the makers of a documentary filmed on Channel Four. He said the film, 'The Great Global Warming Swindle', was 'grossly distorted' and 'as close to pure propaganda as anything since World War Two'[1].

Public service broadcasting is a precious flower. It's time to defend truth and integrity of our documentaries, through the public service mandate. The BBC of Lord Reith, Kenneth Clark and David Attenborough should follow, intensify and expand it's mission to inspire and educate. Other broadcasters should not forget their responsibilities. The alternatives are either a media and a society manipulated by hidden interests and characterized by a race to the bottom; or the inspiration of human civilisation and the natural world. We must be brave enough to make the choice.

[1] http://www.guardian.co.uk/media/2007/mar/11/broadcasting.science