What's the difference? Well, if the planet is heating up because of some internal process operating to increase solar radiation, or the obscure perturbations of the planet Zogg, then there is precious little we can do to affect the process, although there are some strategies we could pursue..

If it is anthropogenic, then there is a lot we can do (at least theoretically).

It is interesting, and rather sad, that what is at heart a scientific, technical question, has rapidly become politicized, and that rational discussion is becoming rather rare (on both sides).

I say keep "anthropogenic". It is much more spiffy than "man caused." What's a college education worth if you can't use three dollar words....