So, an "international panel" says global warming and sea-level rises will continue regardless of greenhouse gas reduction.
So why bother destroying the US economy with all these proposed draconian regulations?
Because the longer we continue ignoring the reality, the worse the outcome will be. At present, we have some50 odd years of worsening conditions, were we to return to living in sod houses today. It's a compound problem, not a 'the damage is already done so fuck it' scenario. The longer we remain hell bent on living as we do, the worse it will get.