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.

The urgent finds you; you have to find the important. Importance is not fast. It is slow. It is not superficial. It is deep. And as a result, it's extremely powerful. When important matters go wrong, they undermine everything. When they go right, they sustain everything.

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!

Style is time’s fool. Form is time’s student

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.

Science is the only news. When you scan a news portal or magazine, all the human interest stuff is the same old he-said-she-said, the politics and economics the same cyclical dramas, the fashions a pathetic illusion of newness; even the technology is predictable if you know the science behind it. Human nature doesn't change much; science does, and the change accrues, altering the world irreversibly

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