Don't good economists do the same?

Economists also attempt to test micro-economic principles through controlled, randomized experiments, similar to how psychology experiments are conducted.

How is that a controlled experiment, or any different from what economists do?

A controlled experiment in climate science/geophysics/etc would involve building two earths (or stars, in the case of astronomy), subjecting one to a treatment and using the other as a control.

Do you have a link to an example of somebody doing that? All the headlines regarding climate science seem to be about fitting a curve to previous decades' data.