What are these technologies?  Are they the ones we use now in the same proportions?  Mainly coal, nuclear, gas, and oil?  With a tiny percentage of wind, solar, water, geo heat exchange, primitive grid load timing, and so forth.

Is he claiming that going forward in this same mode in the same proportions, with no progress, cannot support both growth and climate cure?

This is a tautological statement, and as such says nothing useful about the real world.  It is true by the defiinition of the terms used.

By  shifting the current techology mix over the next 20 years to renewables and conservation, growth in quality of life and GHG reduction can occur.  That is even without breakthroughs in renewable and conservation energy technology.  Which undoubtedly will continue.

Overcomplication of these issues is a big problem.   Economists tend to obscure the way forward with a lot of theory laden terminology.  It's contagious.

So we end up with diversion into areas no one can really fathom.  We can pretend we understand how markets work and how to design perfect ways to make them solve these problems.  But if anyone of us really understood how markets and the economy works we would be richer and more powerful than the oracle of omaha himself.   Warren Buffet.

We aren't.  And I bet the man himself, the most successful investor in human history, would not claim to understand how markets work.

So quit acting like big shots and embrace simple solutions.  And try to avoid getting tangled up by silly sylogisms like the one that started this thread.  They don't address reality.

These people, on the other hand, seem to be addressing the reality of the serious crisis we are in.  Check out the list of their projects.

http://www.nativeenergy.com/pages/our_projects/14.php  

Simple solutions, wind, solar, farm biogas.  On a small scale yes.  So increase the scale, put it on a smart grid.  That's simple.

Don't get lost in important sounding nonsense.  that no one really understands, especially the economists themselves. 

Confusion creates opportunity for hedge fund thievery through market manipulation.  Don't they already control enough of our lives?  They are now holding our financial future for ransome, demanding bailouts without any regulation imposed.

If the fed does not agree to their demands they take their chips offshore and leave us in recession.