I first heard about entropy in a freshman chemistry class. The professor explained how all things tend to move toward disorder unless energy is exerted to re-establish order. At the time, I thought this concept was interesting but of no real practical value. I have since come to realize that I was very wrong.
Anyone who knew the answer to that could make a lot of money, even in agriculture. We don't know what the future holds for us, but there are people at work trying to shape a few changes and I have the privilege to try and help some of these come about.