Comment Re:...but Trump Says (Score 1) 69
If the Ember trend (solar+wind continuing to meet new electricity demand and strongly displace fossil generation) continues and scales up aggressively only in electricity, then by 2100 we’d likely avoid ~0.2–0.35 C of warming relative to a BAU electricity case — a useful and meaningful improvement, but not a return to pre-industrial “normal.” To actually reverse global temperature to pre-industrial levels would require removing thousands of gigatonnes of CO (net) — a feat that, at realistic removal rates, would take centuries to millennia.