Twenty years ago
Wednesday, April 26th, 2006Twenty years ago I was an environmental sciences major at UC Berkeley. In the spring of 1986, I was taking Energy & Resources 102 from John Holdren and Mark Christensen. I loved that class. We used John Harte’s Consider a Spherical Cow: A Course in Environmental Problem Solving, which was all about doing order-of-magnitude calculations to quantify environmental questions. It turned out to be one of my favorite textbooks. Although I don’t often have a need these days to do Spherical Cow’s kind of back-of-the-envelope figuring, I still keep it on my shelf at work as a reminder that I can if I have to.
April 26, 1986, was a Saturday. The next class meeting was the following Tuesday. Professor Holdren strode into the lecture hall with a gleam in his eye. “I was going to put off covering pollution dispersion and atmospheric plume modeling for a few more weeks,” he said. “But considering current events, I decided to move it up a bit in the schedule. This is too good an opportunity to pass up.”
There had been a big release of radioactives at a nuclear reactor in the Ukraine, at a place called Chernobyl. Nobody knew exactly what had happened, but it sounded bad.







