One of the ugly secrets of the renewable-energy industry is that its products make no economic sense unless they are highly subsidized.
Nathan MyhrvoldA blowtorch is a wonderful thing. You can get one of those for about 25 bucks at Home Depot. And there's a ton of things that you can use a blowtorch for, in browning a steak or touching up the browning of a chicken or making creme brulee.
Nathan MyhrvoldFor relatively modest amounts of sulfur dioxide injected into the atmosphere, you could easily cool Earth by 1% or more, if you want.
Nathan MyhrvoldIf people don't find what you are doing threatening, then it is probably not very important.
Nathan Myhrvold