The article starts with
we are near the theoretical limits of what is possible from efficiency improvements in existing hydrocarbon technology or from wind, and solar energy and battery storage... [and] Hydrocarbons collectively supply 84% of the world’s energy. wind, solar, and batteries provide about 2% of the world’s energy and 3% of America’s.The second part is meant to show you how piffling renewables are; the first presumably is to convince you that renewables can't grow much more.
But these are both non-arguments. They're direct from the MI report, and I suspect our author hasn't managed to think his way around them, so I will do it for you, in the unlikely event that you can't.
The argument that we're close to the limits on efficiency, and are therefore stymied, is silly because that's not where the increase in wind or solar will come from: it will come from more deployment. Which people consistently underestimate. I could write more words, but really his error is that simple.
Nooks: public unease
His killer argument against nooks is public unease. There is truth in this, but to quote the quoteable but not entirely accurate EW at WUWT: Has anyone else noticed how weak green excuses for not embracing nuclear power are? I mean, on one hand greens tell us the world will end in 12 years or by 2050 or whatever, yet in the same breath they tell us nuclear power is too dangerous because there might be a few meltdowns. How could the risk of a few meltdowns possibly be worse than the end of the world? And of course in some places - e..g. France - this unease seems to be overcome. I once thought we would be obliged to overcome this, now I'm doubtful: solar will probably take over instead.
Proportion of supply
Their 2% value isn't really an argument, just a note about the present. And a somewhat deceptive one; this says that renewables (mostly hydro) account for more than 20% of global electricity. It does tell you something about the maturity of wind+solar though: if it is currently a small proportion, we're not well used to integrating large proportions of it into supply. Though the UK survived well enough recently.
While I'm here, this report from the IEA says that "modern" bioenergy is bigger than hydropower, which is bigger than wind+solar combined. I find that somewhat surprising.
I haven't bored you with rowing for a bit, and didn't have any other pic to hand. Town bumps is next week, we've been tapering and doing a few short starts; I tried pointing the riggercam onboard as an experiment. Yes, two could sharpen his catches a little.
* Can planting trees save our climate? - RealClimate by Stefan