If and when the whole world is secure, we have won a right to explore space, and the oceans. Until we have demonstrated that we can establish a productive and secure earth society, we do not belong anywhere else, nor (I suspect) would we be welcome elsewhere.

My students are constantly amazing me.

A house should look after itself - as the weather heats up the house cools down, as the weather cools down the house heats up. It's simple stuff, you know? We've known how to do it for a long time.

You can hit a nail on the head, or cause a machine to do so, and get a fairly predictable result. Hit a dog on the head, and it will either dodge, bite back, or die, but it will never again react in the same way. We can predict only those things we set up to be predictable, not what we encounter in the real world of living and reactive processes.

The value of land must, in the future, be assessed on its yield of potable water. Those property-owners with a constant source of pure water already have an economically-valuable "product" from their land, and need look no further for a source of income.

Trees are responsible for 3/4 of all rains

If you're dealing with an assembly of biological systems, you can bring the things together, but you can't connect them.