By Viv Forbes
A "greenhouse gas" is one capable of absorbing infra-red (IR) radiation.
The most common atmospheric gases with such properties are water vapour and carbon dioxide (CO2). Water vapour is far more abundant with an average of 20,000 parts-per-million (ppm) in the atmosphere compared to just 395 ppm of CO2. Moreover water vapour is more effective as a greenhouse gas because it can absorb IR radiation over far more bands of the IR spectrum.
Therefore, if man-made CO2 causes dangerous global warming, (a dubious proposition anyway), then man-made water vapour is far more dangerous.
The two main electricity generation fuels in Australia are coal and gas. Coal is a dense fuel with a high carbon content which, when burnt, produces mainly CO2 with some water vapour. Natural gas has more hydrogen and less carbon and produces a higher proportion of water vapour, the main greenhouse gas.
Thus if the climate alarmists are really scared of man-made greenhouse gases, they should be promoting coal instead of gas or systems that need 100% gas backup, such as wind. Gas generates copious quantities of both “greenhouse gases”.
And if they believe a tax on man-made greenhouse gases will control the climate, a tax on steam makes more sense than a tax on carbon dioxide
Finally, if they want "zero emissions" of either greenhouse gas, the only significant energy sources that qualify are nuclear, hydro and geothermal. Naturally the only one unlikely to prove widely useful in Australia, geothermal, is the only one promoted by the greens.
Maybe the climatists are not fair dinkum?
Or maybe the whole man-made global warming scare is an unscientific fraud?
(For a look at how well the IPCC forecasts of dangerous man-made global warming are working out see here: