I wonder when the "Deniers" would start to agree our climate is warming (if indeed it is, and I don't mean a use of the term in any negative sense). The projections from the models really only become noticeable in decades, meaning we'd have a climate where it was clearly getting warmer, milder winters by a few degrees and hotter summers. Some coastal areas might be lost (erosion does that anyway).
But the projections are perhaps a 1 meter rise in sea level (3.3 feet) by 2100 (some of which has already happened). So, sea level change over ten years is not going to be observable/noticed by unaided humans. Temperature increases are projected at 2-7°C, the worst case would be really really bad, but 2°C over a century is pretty modest (about 4°F, or half a degree per decade).
So despite all the drama in the "news", this is a slow moving event (assuming the models are close). We can easily hit 2030 or 2040 and folks will be saying "I told you so" if the Arctic ice cap is still intact year round (which is very possible) and nobody really notices warming.
Maybe by 2050 folks will have to agree our climate is warming some, even if they disagree about the why. Maybe.
Our political systems don't do well with highly technical issues that take a long time to be apparent, and by then it's too late.