One advantage of a solar collector in space: It would be some kind of origami thing that would unfold and be relatively light because it doesn't have gravity to deal with.

When the government tries to run innovation, sometimes it does it well and sometimes it doesn't. So setting up a situation where the market runs innovation, which is a cap-and-trade idea, may well have more flexibility.

If all of your electricity in your lifetime came from nuclear [energy], the waste from that lifetime of electricity would go in a Coke can.

Information wants to be free. Information also wants to be expensive.

We have wished, we eco-freaks, for a disaster or for a social change to come and bomb us into Stone Age, where we might live like Indians in our valley, with our localism, our appropriate technology, our gardens, our homemade religion-guilt-free at last!

Historians will consider this a dark age. Science historians can read Galileos technical correspondence from the 1590s but not Marvin Minskys from the 1960s.

The main problem with solar on the Earth's surface is that it is so intermittent, and we don't have decent storage yet.