Re: sustainable, clean energy
"It does until it goes wrong and you send a massive radioactive cloud over half the planet, what would really be useful is if you could build a massive nuclear reactor somewhere far away, maybe 150 million km away or there abouts, then use some sort or receiver on earth to collect that energy."
What a brilliant idea! Now all we need to is to invent some of those energy collectors you mentioned that are way more than 4% efficient and don't require enormous amounts of energy to produce and don't result in lots of pollution from mining and processing of the more exotic elements currently used. Oh, and a way to store all the excess energy for those days when the sun don't shine. Or those winter days where even when the sun does shine, it's for barely 6 hours out of 24 and at a very low angle where I live.