Natalie Bennett on government advisers' climate change view
14 February 2014 Last updated at 13:32 GMT
Senior government advisers in any position who do not believe in climate change should be removed from their posts, said the Green Party leader.
Natalie Bennett attacked the policies of Eric Pickles and George Osborne, and said the government needed people "signed up to action".
And she told the BBC's Ross Hawkins that a claim of the "greenest government ever is currently a sick joke".