One Nation senator-elect, Malcolm Roberts, told Hack there's no empirical evidence humans are to blame for climate change.

Ninety-seven per cent of climate change scientists say he's dead wrong.

Let's see what some of them make of his claims.

Malcolm Roberts: "There is nothing unusual occurring with temperatures, we're not encountering any unusual warming, it's all entirely natural."

This claim doesn't stack up according to John Cook, a climate communication research fellow at the University of Queensland's Global Change Institute.

"When scientists look at our climate systems, they add up all the heat in our climate system, they find that over the past few decades our planet has been building up heat at the rate of four atomic bombs per second, so that's how much global warming is happening at the moment, so it's very unusual."

Conclusion: Malcolm wrong.

Malcolm Roberts: "We've had no warming at all according to NASA's science satellites since 1995. That's 21 years."

John Cook says this claim is a bit more complicated, but it still doesn't fly.

"One of the challenges there is [satellites] are looking through many layers and the upper part of the atmosphere is actually cooling and that's one of the consequence of greenhouse warming.

"Satellites measure heat as it escapes to space, and what satellites over the last number of decades have found is less heat escaping out to space at the wavelengths where CO2 traps heat, so this is direct empirical evidence that CO2 traps heat."

Conclusion: Malcolm wrong.

Malcolm Roberts: "Not one of [the Intergovernmental Panel on Climate Change reports] has ever presented any empirical evidence that human production of carbon dioxide affects the global climate."

Malcolm is referring to the Assessment Reports put out by the Intergovernmental Panel on Climate Change (IPCC), a group of 195 nations and thousands of scientists who thoroughly comb through climate change evidence every few years.

Professor of atmospheric physics at UNSW, Steve Sherwood, was a lead author of a chapter of the IPCC's most recent report. He's very sure there's evidence in there linking human CO2 emissions to warming.

"You can measure the amount of heat that has been put into the atmosphere by human emitted carbon dioxide, it's about a million gigawatts of power and if you know that then you know by conservation of energy that the system has to be warming up, that number, those heating amounts are in a bar chart in the exec summary of the IPCC report, have been every single time."

Conclusion: Malcolm wrong.

Malcolm Roberts: "The empirical evidence showed the carbon dioxide levels in the atmosphere changed as a result of temperature changes, not as a cause of temperature changes."

Let's use Cape Grim in Tasmania as an example for this one, the CSIRO and Bureau of Meteorology have a climate monitoring station there which has seen levels of carbon in the atmosphere rise from around 300 parts per million in 1976 to 400 parts per million in May this year.

UNSW's Steve Sherwood told Hack this statement would have been nearly correct during the glacial ice age some thousands of years ago, for which there is evidence CO2 affected temperature, and the temperature affected CO2.

"But that was a special case of that era in the geologic record," Steve Sherwood said.

"Today it is very clear humans are increasing CO2 and CO2 is increasing temperatures."

Conclusion: Malcolm wrong.

Will Malcolm change his mind?

Even with this information in front of him, probably not. At least according to John Cook from UQ's Global Change institute.

"From a psychological point of view I'm not optimistic," John Cook said.

Part of John's research involved handing climate skeptics evidence of warming, so he's pretty well placed to talk about what impact it has.

"When someone denies climate science and when they believe in conspiracy theories about climate change, when you present scientific evidence to them it has no effect, other than possibly a backfire effect, it can be counter-productive and actually strengthen their false beliefs."