"Not profitable enough my son ..."
I have not yet read the links in detail but 1 first reaction.
Even if this (low) figure was multiplied by 10 (children, "too" poor ... see remundo's remark), it remains very little ... especially for us the rich! For example, it is much less than the car budget of all French people !!
But it is perhaps not so much the investment that poses the problem as the capitalism that governs us ... "We" invest in what pays the most the fastest. Bar point. And green electricity renewable energy is not competitive on this point at present ... in X years the situation will be different ... but today it is an unstoppable fact !!
The "risk" is (generally) not a predominant factor in the investment (except on the marketing brochures of course) ... it is not in the short term so certainly not in the long term as is the case climate change ...
We just saw it in
the BP oil spill in the new mexico!
Then there will always remain the problem of "oil transport" ... and the lifespan of renewable installations that will have to be changed well before 2050 (does the calculation take this into account?)?