I'll jump in. A few years back I did a quick calculation with publicly available data and a prediction that was made and published 30 years ago that was based on the radiative forcing of carbon dioxide (taking into account human emissions). I had no idea how this would work out. The result suggests the models are better than we give them credit for and that the forcing of those models with carbon dioxide produced by people would match the conditions that resulted after those models were made. This is what climate science can tell us. The climate predictions are of use for people in insurance industries, military, and other businesses. I am well aware that we cannot prove things physical or climate related, however, we have a lot of evidence that points to a human impact. Pollution, environmental change, frequent flooding, tornadoes, climate change whatever you want to call it. Humans have an impact on the system and it is just a question of how much.
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The yellow dots are the ones since the model was published.
It is not in our interest to admit responsibility when it could cost us money now and in the future. We love to argue. It isn't going to change no matter how much we stick our heads in the sand.