By John Staddon – The Daily Sceptic
As the West fitfully weakens industrial civilisation by trying to eliminate oil, coal and natural gas as energy sources, the scientific basis for Net Zero is based more on ‘general agreement’ than hard data. Climate scientists nevertheless sound optimistic about the progress that’s being made in destroying society’s carbon energy base.
There are of course criticisms of the idea of a carbon-dioxide-induced apocalypse, largely supported as it is by general circulation (i.e., whole-earth) planetary models. There are too many different GCMs all with too many free parameters (aka ‘fudge factors’), as well as wildly divergent readings of historical climate records: Are violent climate events really more frequent, and how does weather actually relate to climate? The popular press cries havoc, but the data are not so clear. The looming economic costs of a Net Zero target are leading to some political pushback. Nevertheless, the recent jury acquittal of nine Extinction Rebellion vandals shows that passionate belief in the imminent dangers of CO2 is not limited to activists.
Climate science is complicated, but the key question is simple. The climate does seem to be getting warmer, but are we responsible? Does the level of atmospheric carbon dioxide have a major effect on the temperature of the earth? The standard answer is “yes, of course”. But in fact there are good reasons for doubt.
Popular accounts of the ‘climate emergency’ rarely show quantitative data. Yet there are widely available graphs that anyone can understand. Here are three graphs which suggest that the answer to the question is probably “no”. It is likely that beyond a certain point, carbon dioxide has a relatively minor effect on planetary temperature ..
Full article …
