Especially if the energy used to make a PV Solar Cell is still -less- than the amount it's expected to produce, over its lifetime, PV solar energy might not be the best choice of sustainable energy to invest in.
(Batteries for -local- storage of electrical energy might be good, eg, as anything that disconnects one's home or office from mains power is a problem almost anywhere.)
In a post-Fukishima world, the EC - if not [also] Germany - should be investing in Energy from Thorium (eg, developing improvements of its proven technology from the 1950's, which even Germany has successfully trialed in the 1960's or the 1980's, I understand).
For many of the reasons (ie, features), cf Prof Dr Eduardo Greaves' [36-min.] talk "Thorium as Nuclear Fuel in Molten Salt Reactors" (on YouTube.com). (The impatient can search TED.com for Sorensen's 10-min talk & view at least its last 5 min's.)
R&D should run in parallel with Education & Debate, in the hopes that the Public will soon "get" that there are several types of reactor, some (eg, Liquid Fluoride Thorium Reactors = LFTRs) being much -safer- than Fukushima's reactors proved to be.
We should all understand the differences between even Canada's (long ago) improved CanDo reactors (still in the same "safety class" as Fukushima's, I understand) -and- LFTRs, which are expected to be not only "walk-away safe" but also cheaper to build & run.
After people come to understand the significant differences & inherent advantages in the design of LFTRs (and their safety levels are verified in ways that give all peoples confidence to embrace them, even near their back yards), we'll be able to make another great stride in our energy technology that can enable us to:
1. reduce CO2 emissions, & also turn back Climate Change that appears to be caused by it
2. enable any & all nations to build & use LFTR-technology - instead of current Plutonium-producing reactors, that we limit today
3. reduce the amount & cost of spent-fuel storage, eg, by consuming that fuel & getting energy from what was once waste
4. reduce or even eliminate "oil wars"
5. enabling us to -stop- "fracking" for Shale Oil &/or Coal-Seam Gas (CSG), which destroys water & land resources
6. reduce internal conflicts within nations (eg, legal battles & protests over "fracking")
7. redirect our minds to innovative & exploratory projects, in Science, Medicine, Space, Community Development, etc.
I see only win-win's from Energy from Thorium... are there any risks or disadvantages?
Let the debate continue, eg, in you comments & replies.