The problem is that people seem to conflate the science, facts, and the politics of climate change. They think if you disagree with any part, you are a "denialist". So what do I mean?
Well first take the fact of climate change: That the average global temperature is changing outside of known cycles. Provided the data on which this is being based, this is true. It is a fact, a simple observation about the world.
Then there's the theory of climate change: That this change is being cause either primarily or exclusively by carbon dioxide in the atmosphere, as a result of human emissions. This is a theory, it provides a logical proposal to explain the facts. Like any theory it could be subject to revision or dismissal later should more information come to light. Doesn't mean it will be, but it can (if it isn't falsifiable, it isn't a scientific theory).
Now after that you get some additional theories like the theory that this will be a net bad thing for humanity. Remember that this is not a fact, it is a theory, and that the overall theory of CO2 causing climate change could be right, and this could be wrong. As such one could reasonably examine the evidence and accept the first theory and reject the second.
Then you get in to politics or policies: That the only thing to do about it is to massively reduce CO2 output, institute carbon taxes, etc, etc. That isn't a scientific theory there, it is politics. There are other solutions that would work. One example would simply be to prepare for the chance and deal with it. You could argue that even if this particular change is human caused, in the future a change will happen that isn't, so better to spend resources on becoming resilient to change than trying to avoid this one. Geoengineering would be another approach to dealing with it. Different policies can be debated, the costs, the benefits, and so on, there is no one right answer here, there are options.
However if you disagree with any part, you get labeled a denalist. So you can say "I think the Earth is getting warmer, and I think manmade CO2 is the cause. However my examination of the evidence leads me to believe it is not a bad thing, in fact it'll be just fine so we shouldn't do anything," and you get shouted down as "denying climate change." Or you can say "I think it is happening, manmade, and a bad thing. However I think reducing CO2 production is the wrong approach. I think we should do geoengineering because it is cheaper/more effective/etc," and you get shouted down as a "denialist."
That's my real problem, is people confuse the levels of it. There are facts (all scientific theories have to start with facts, observations), theories, and then policy suggestions as a result. Calling it all bullshit can be accurately called denying it. However being skeptical or disagreeing with parts cannot.
Also there's way too much stock put in computer models. Not that they are used, but that people think they "prove" something. No, a computer model proves nothing, it is a model. It makes predictions. If the predictions are repeatedly accurate, it is probably a good model of reality and can be counted on to produce accurate predictions in the future. If they are inaccurate, it needs to be revised. However it doesn't "prove" shit. It models.
So while models should (and must) be used in climate research, people need to stop saying things like "This model proves that X will happen in Y years!" No, it predicts it. Well and good, that's very different from proving it.
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