What would you accept as evidence of a "broad scientific consensus" that climate change "would have massive effects on human civilization"? It's not 84% like

What would you accept as evidence of a "broad scientific consensus" that climate change "would have massive effects on human civilization"? It's not 84% like the number you cite who believe humans contribute, but the 41% figure you cite does tell me that roughly 1 in 2 climate scientists think we're doomed if we do nothing. I would call that a broad consensus, given that a huge majority believe there will be at least a "moderate" effect on human civilization. Incidentally, why are the choices "catastrophic effect," "moderate effect," "relatively little danger," and "humans aren't contributing to climate change, anyway?" Why is there nothing in between "moderate" and "catastrophic" effect? That seems a little suspect to me.