One of Britain's most prominent climate change sceptics is critical of the New Zealand government for believing in global warming.
Lord Christopher Monckton is in Australia, giving a series of lectures.
He argues the United Nations climate panel has exaggerated the warming effects of carbon dioxide emissions.
He told Morning Report New Zealand should not pursue an emissions trading scheme.
Lord Monckton said the Inter-governmental Panel on Climate Change is now admitting almost daily that its claims about global warming are wrong.