There are powerful politicians who have taken to denying scientific facts to further their own ambitions.

This took another massive leap into the abyss when President Trump removed all the limits on greenhouse gas emissions in the US.  Not a solution to the problem - just a denial of its existence. Inconvenient scientific facts denied and dismissed.

There is a new book edited by Lawrence M.Krauss - The War on Science.

Among the writers and scientists who have contributed chapters is Richard Dawkins.

Professor Dawkins talked to me about his chapter.