Not that clear that local climate impacts would scale. It's a different mechanism at work: changing the energetics and every ecosystem on an entire planet (indeed, changing its emitted spectral lines) is a whole lot more than introducing new plants or physical structures to a couple square miles.

What I find so fascinating about climate change is that we are able to do this. It's a bit less huge than our atmosphere getting populated with oxygen for the first time, but still really exciting. Intellectually exciting, I mean, and personally terrifying.