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

This is pretty much the infrastructural stuff that comes along with large quantities of energy. Whichever technology we are looking at has serious hazardous issues.

We can influence the future but not see it.

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.

Over the next ten years, I predict, the mainstream of the environmental movement will reverse its opinion and activism in four major areas: population growth, urbaninzation, genetically engineered organisms, and nuclear power.

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.

Tool - something with a use on one end and a grasp on the other end.