The recent breakthroughs in nuclear batteries make most of the other "renewables" completely irrelevant.   A spending program entirely devoted to fission and direct conversion to electricity would far exceed the benefit from any other present "green" technology.

Very interesting article.  

One thing though:  "Popa-Simil agrees, saying it will be at least a decade before final designs of the radiation-to-electricity concept are built."

Unfortunately we don't have a decade to wait for a miracle technology.  We need to utilize the available technology and get things going.  There needs be investment and development in renewable energy.  If these nuclear batteries do come out, great!  But until then, lets put our efforts into something currently feasible.  

If solar and wind power are such great investments and economically competitive, what with the vanishing supply of oil and the trend against more coal-fired installations, why does $20 billion in private investment 'dry up' if these projects don't get a taxpayer-funded handout?

Inquiring minds would like to know...