He made a good investment! Great on him!
I know that many gore haters will scream the usual money whore type comments. However in this nation there is nothing wrong with saying good things about something you have money in. Or better yet putting your money where your mouth is. Markets the way they are some of these huge solar investments have flopped. There is significant risk involved in such investments.
There is boatloads of tech right now ripe for risky investment tho. If I had the funds I would put serious investments into Algae to Oil efforts. As fusion does little good for fuel eating jetliners. Algae oil would stabilize the liquid energy markets. And drive away the power of OPEC. Not to mention it has more uses than Washington carver's peanuts!