We do have economies B for controlled experiments and that data is pretty clear.
The richest countries are those who use the most energy to help them deal with nature.
Effects might happen depending on the temperature but we don't know which or how severe or when or if it will. We don't know how much humans affect it meaning that we don't know if it even make sense to do anything.
Evolution is not scientifically demonstrated. It's a way to interpret the data and observations from biology. It's the model that explains the best, but it's not in itself science just like climate science isn't science in any concise way but rather an interpretation of data.
It's that data which is being discussed and speculated about. We are very far from demonstrating even a fraction of what we speculate.
Mathematics isn't science it's a tool used in science.
The most precise form of science we have is those that follow the scientific method ex. in physics where both theoretical claims and actual observations need to agree with each other plus predict the causality. And even here it's extremely hard to claim something is scientifically proven.
I am not sure what you mean with modern physics, can you be more concrete? What modern physics are just speculation and what does that have to do with the physics that isn't just speculation and theory?
Just because you believe a forthcoming climate catastrophe is real does not make it science in any meaningful way where we can talk about consensus and scientific predictions. You don't get a free pass to claim things just because you think the word as we know it might end.
Climate science is more akin to sociology or macroeconomics, i.e. a lot of speculation and interpretation and very little scientifically demonstrated foundation.
Climate science is interpretation of data, its not the data itself and even that data is highly varied in quality. In other words, its no a very precise form of science.
Scientifically demonstrated is not the same as speculated.