“ A zero-emissions US is now pretty cheap “

[gabester]

I just want to point out that as our grid becomes increasingly renewable-powered, zero emissions will slip away from our grasp thanks to upcoming energy-consumption increases from the likes of EVs (currently our gas/diesel/ethanol vehicles aren't accounted on the power grid) as well as blockchain-derived virtual currencies and training/utilization of increasingly pervasive AI. And let's not forget the tech bonanza fueled for the last half century by Moore's Law is essentially at an end, diminishing returns for the next decade and likely zero improvement past that, unless computing goes optical or quantum, the latter of which again has significant power draw for its currently limited implementions and applications.

If humanity can evade these limitations then there's a chance we might stop warming at 3-4 degrees C...

Sorry folks I'm feeling a mite pessimistic tonight. And none of this means we shouldn't pursue a renewable/zero emission grid globally.