Geology definitely has more experimental falsification attempts going on than economics.

If you have a theory that is impossible to falsify experimentally, we're no longer talking about science (at least if your idea of science is the pursuit of objective truth). Modern "science" running amok with people more concerned with attempting to prove themselves correct than find the truth doesn't change that.

> Popper's falsification is a pretty unrealistic account of how science actually works

That's the rub though. A pretty strong argument can be made that "science" is not working and that "scientists" have lost their way, if you look at things like the reproducibility crisis.

There are many scientific fields that cannot conduct experiments, such as climate science. To say that this is not science is quite naive.

First off I reject the premise that people investigating the climate cannot perform experiments.

Even assuming what you say is true, if not experiments and attempts at falsifying your ideas, how does one pursue the truth?

You only have one planet, it's a little difficult to split it in two.

How would you suggest we run randomised experiments on the climate (or the macro-economy)?