I once attended a full day conference by Amory Lovins where I listened to his jokes 4 times in a row.

Anyway, this guy is really something else and is probably the greatest advocator for energy efficiency in the US. Here's some interesting career advice, and coincidentally, quite similar the advice of taking up psychology my father always tells me to do:

"Students who are interested in CleanTech should have some scientific or engineering knowledge and some economic acumen, but they should also study social sciences, like culture and anthropology.

If you continue to pursue learning , Lovins said, “you’ll learn early that you can learn more in 6 months than most people know about just about anything,” and this holds particularly true in this very dynamic moment in history.

Once you are in the field, you just need to take advantage of individual people’s knowledge and - tap it."