I recently became aware of an article published on The Conversation website over a year ago, written by James Painter, author of Poles Apart: the reporting of international scepticism. The article, entitled Enough scientific certainty exists on climate change to challenge media sceptics (4 March 2014), is still worth reading if you haven’t seen it. Here is the crux of his argument:
So when sceptics stress the “nobody knows” narrative, they are misrepresenting the existence of any uncertainty at all as meaning that, for example, no action to reduce carbon emissions is necessary. It’s the nature of climate science that there are lots of uncertainties, but this doesn’t mean scientists know nothing, or are simply speculating.
However, it should be noted here that Painter uses the terms ‘scepticism’ and ‘sceptics’ solely for convenience: As is self-evident from what he writes, he does not accept this is an accurate term for those whose statements he analyses. If you do not understand what I mean, perhaps the following will help: Having read the above article, I decided to look at the comments, amongst which I found this from someone going by the name goldminor sanchez:
Here is another way to look at co2. Human emissions of co2 equal approximately 4% of the yearly release that goes into the atmosphere, the other 96% is natural. Co2 itself constitutes 400 parts per million of the atmosphere. So we have only added a tiny fraction of the total amount of a fractional gas. If the Earth was that sensitive to such a tiny change, then man and most life forms would have been wiped out many billions of years ago. That is something to consider.
This comment is so misleading, or simply betrays an astonishing level of scientific illiteracy, that I felt compelled to respond (even though over one year late). I also reported sanchez for being misleading. Therefore, just in case his comment is removed, I have included it above. However, for ease of reference, here is my response (which explains what real sceptism is):
Here is yet another way to look at it… “Natural” CO2 is in constant circulation between the biosphere and the atmosphere (as is water), whereas “unnatural” CO2 has been out of circulation for millions of years. Thus, humans are well on the way to adding all this geospheric carbon back into the biosphere in just 300 years (thousands if not millions of times faster than the Earth can recycle it). There have been 5 mass extinctions in geological history, all of which have resulted from climatic changes that occurred faster than organisms could adapt. Post-industrial change is about ten times faster than any “natural” change in geological history. That is why biologists have concluded that the 6th mass extinction is already underway. To be sceptical is to accept that all our beliefs about reality are potentially falsifiable by contradictory evidence. Therefore, rejecting all evidence contrary to your antecedent beliefs (as young earth creationists do) is the opposite of being sceptical.
Given all of the above, it should be clear that disputing the primary human responsibility for ongoing climate change is not consistent with some very basic physics,* the totality of what we should learn from the Earth’s geological history, and the philosophical roots of genuine scepticism. ————- * See: https://anthropocenereality.wordpress.com/2012/07/11/conserving-mass-water-and-energy/