Something important is happening in the debate over man-made global warming. Australia is beginning to rethink its government's own cap and trade scheme while an intellectual sea change is occurring that is giving more weight to legitimate scientific criticisms of the evidence for climate change.

Robert Tracinski and Tom Minchin writing in RealClear Politics explain that the government of Prime Minister Kevin Rudd has had a series of "climb downs" on climate change legislation that gives hope that sanity may prevail in at least one westernized industrial democracy.

Take Australian Senator Steve Fielding who decided to investigate the evidence himself. An engineer by training, Fielding attended the recent Heartland Institutes Climate Change conference where skeptics presented about a dozen papers that exposed several myths about global warming:

Fielding has issued a challenge to the Obama White House to rebut the data. It will be a novel experience for them, as Fielding is an engineer and has an Australian's disregard for self-important government officials. Here is how The Age described his challenge:

Senator Fielding emailed graphs that claim the globe had not warmed for a decade to Joseph Aldy, US President Barack Obama's special assistant on energy and the environment, after a meeting on Thursday.... Senator Fielding said he found that Dr. Aldy and other Obama administration officials were not interested in discussing the legitimacy of climate science.

Telling an Australian you're not interested in the legitimacy of your position is a red rag to a bull. So here is what Fielding concluded:

Until recently I, like most Australians, simply accepted without question the notion that global warming was a result of increased carbon emissions. However, after speaking to a cross-section of noted scientists, including Ian Plimer, a professor at the University of Adelaide and author of Heaven and Earth, I quickly began to understand that the science on this issue was by no means conclusive....

Much of what we have read about climate change, [Plimer] argues, is rubbish, especially the computer modeling on which much current scientific opinion is based, which he describes as "primitive."...

The Earth's climate is driven by the receipt and redistribution of solar energy. Despite this crucial relationship, the sun tends to be brushed aside as the most important driver of climate. Calculations on supercomputers are primitive compared with the complex dynamism of the Earth's climate and ignore the crucial relationship between climate and solar energy.

To reduce modern climate change to one variable, CO2, or a small proportion of one variable-human-induced CO2-is not science. To try to predict the future based on just one variable (CO2) in extraordinarily complex natural systems is folly.

There is rising recognition that introduction of a carbon tax under the guise of "cap and trade" will be personally costly, economically disruptive to society and tend to shift classes of jobs offshore. Moreover, despite rising carbon dioxide concentrations, global warming seems to have taken a holiday....

With public perceptions changing so dramatically and quickly it is little wonder Ian Plimer's latest book, Heaven and Earth, Global Warming: The Missing Science, has been received with such enthusiasm and is into its third print run in as many weeks. [It's now up to the fifth printing.]

The public is receptive to an exposé of the many mythologies and false claims associated with anthropogenic global warming and are welcoming an authoritative description of planet Earth and its ever-changing climate in readable language.