In the speech, Mr Turnbull said Australians normally relied on and respected the views of agencies like the CSIRO or the Australian Academy of Science when it came to issues of science.
''Yet on this issue [global warming] there appears to be a licence to reject our best scientists, both here and abroad, and rely instead on much less reliable views. Some of those less reliable views are from scientists - although most are not,'' he said.
''In an age where the internet gives everyone the opportunity to be a broadcaster, you can find an opinion to support any proposition. If it doesn’t suit your interests to reduce the use of fossil fuels, there are plenty of blogs and articles online to support your self interest.''
He said former British Conservative prime minister Margaret Thatcher took climate change seriously, so taking action to protect the environment could ''hardly be the mark of insipient Bolshevism''.
''It is important to remember however that the rejection of the consensus scientific position on global warming, rejection of the CSIRO’s position on global warming, is not Liberal Party policy,'' he said.
........Although a 5 per cent cut would not single-handedly stop global warming, it was a ''measured and prudent contribution to what needs to be global effort to reduce greenhouse gas emissions''.
''Having said that, it is undoubtedly correct that there has been a very effective campaign against the science of climate change by those opposed to taking action to cut emissions - many because it is not within their own financial interests - and that this has played into the carbon tax debate,'' he said.
He compared the situation to someone ignoring the advice of a doctor to quit smoking and lose weight, because ''somebody down the pub told you their uncle Ernie ate three pies a day and smoked a packet of cigarettes and lived to 95''.
''Now that is how stupid it is and we have to get real about supporting and responsibly accepting the science. And if we want to challenge the science, do so on the basis of peer reviewed work of which I have to say, there isn’t a lot on the contrary side of the argument,'' he said.....(see article)