You are right. It is decided because not only do almost 100% of climate scientists agree, but there in indisputable proof of the basic method of action (CO2, CH4, H20 greenhouse effects) and we can measure that effect in the lab and then correlated it to measured climate change that normalized for various known climate cycles. The consensus in the fields is driven by the overwhelming evidence of the multidisciplinary field results, experiments, and modeling.
The benefit of science (reproducibility, falsifiability) has been hacked by commercial interests. This isn't even in dispute (Heartland, IER, many others). Groups that dispute climate change are all funded by CO2 emitters and the results are coordinated by enormous lobbying and donation campaigns.
Flat earth proponents are not operating within a scientific framework of doubt and proof, and neither are climate change deniers.
The benefit of science (reproducibility, falsifiability) has been hacked by commercial interests. This isn't even in dispute (Heartland, IER, many others). Groups that dispute climate change are all funded by CO2 emitters and the results are coordinated by enormous lobbying and donation campaigns.
Flat earth proponents are not operating within a scientific framework of doubt and proof, and neither are climate change deniers.