Re: Nuclear Power
There aren't many of them in use because they can't be used to make weapons material so research into them is (or was in the 40s. 50s, 60s, 70s, 80s) of no interest to the US, UK, USSR, France, China, Isreal, SA, India, Pakistan etc. It might be of interest to them now - but all their experts have spent the last 50 years researching Uranium.
They are, in theory, of interest to non-weapons states. If you believe that if Iran or N Korea or Syria said - we are starting a major program of research into thorium reactors - then the US would suddenly say "hey that's wonderful, join the club, come over for a barbecue, marry our daughters."
About the only country with a reason to do Thorium is India, it has lots of people, no fossil fuels and no Uranium but lots of Thorium.