Mr Morrison’s office declined to comment.
During the wide-ranging interview, the former Liberal leader said Mr Morrison had “at times” discounted the influence of climate change on the emergency, “which is just nonsense from a scientific point of view”.
“So that’s misleading people,” Mr Turnbull said.
He also called US President Donald Trump the “leading climate denier in the world” and repeated previous claims that Rupert Murdoch’s News Corp media empire was attempting to frustrate action to reduce carbon emissions.
“If you go to any of the right-wing think tanks or read the Murdoch press, it’s just full of climate denialism and it’s designed to deflect from the real objective which has to be to reduce our greenhouse gas emissions,” he told the BBC in his Sydney office.
“To be a climate change denier is a badge of honour on the right wing of politics here and the United States, and it’s mad.
“How many more coral reefs have to be bleached? How many more million hectares of forest have to be burnt? How many more lives and homes have to be lost before the climate change deniers acknowledge they are wrong?
“If a country like Australia is not prepared to grapple with this issue seriously – itself being in the frontline of the consequences, and being an advanced, prosperous, technologically sophisticated country with the means to do so – why would other countries take the issue as seriously as they should?”
Climate change contributed to Mr Turnbull’s loss of the Liberal Party leadership in 2009 and then his prime ministership in 2018. His proposed National Energy Guarantee was abandoned by the Coalition following the botched leadership challenge by Home Affairs Minister Peter Dutton that eventually installed Mr Morrison in The Lodge. Mr Turnbull has since advocated for the NEG to be reintroduced as government policy.
The Coalition is bracing for the release of Mr Turnbull’s new book, A Bigger Picture, in April. The book is expected to reveal new details about the 2018 leadership coup and could be critical of Mr Morrison’s role in the turmoil.
The Prime Minister has acknowledged his holiday to Hawaii during the fire emergency was a mistake and has since ordered a major federal response to the disaster, including a military deployment to affected communities and a $2 billion recovery package.
But he has so far resisted calls to lift Australia’s pledge under the Paris climate accord to reduce emissions by 26-28 per cent on 2005 levels by 2030. Australia plans to use ‘carry over credits’ earned by exceeding its goals under the earlier Kyoto agreement to meet its Paris obligations.
Mr Turnbull has pointed to the British government as a model for a conservative political approach to climate change. Prime Minister Boris Johnson plans to make the United Kingdom carbon neutral by 2050 and is very critical of the impact of coal on the environment.
Mr Morrison accepts the link between climate change and extreme weather events but has said it cannot be blamed for the summer bushfire crisis.
Mr Turnbull said it was not possible to “attribute any particular event, whether it’s a flood or fire or a drought or a storm, to climate change” after a destructive bushfire hit the NSW south coast town of Tathra in 2018.
Bevan Shields is the Europe correspondent for The Sydney Morning Herald and The Age.