It's good that they are actually trying to produce this effect in the lab. Because sometimes those computer simulations are not as accurate as the real thing ...
It's called the scientific method. You postulate a hypothesis (a guess) and you perform experiments based on predictions derived from the hypothesis to see if they pan out. A computer simulation, by definition, only simulates what we already know, so it can't go very far in dealing with what we don't know. Therefore you actually have to do the experiment to see the result.
Unless of course you're a government funded ecologist, in which case you can manipulate the simulation until you get the results that conform with the orthodoxy which you have been funded to "prove." Never mind that real world observation conflicts with your model. Those must be faked by the EVIL RIGHT WING who want to destroy mother Gaia.