The other day I drove by the electrical substation for the 40x80 wind tunnel at Moffett Field. I noticed they were swapping in a new set of transformers. There was this large tank truck that they were pouring old PCBs into from the replaced transformers. Must be a nasty job dealing with shot high power electrical equipment. How do they dispose of several tons of old transformer PCB?

On another topic: "The long term influence civilization". Take a trip to Greece and tour the ruins of ancient Corinth. Ancient Corinth was once a huge city and the major economic center of ancient Greece. Corinth's main claims to fame were Corinthian helmets and religious prostitutes (cult of Aphroditite). The city center of Corinth (the Agora or more accurately the Forum) has been excavated and is extremely interesting. However the vast bulk of the land that was within the ancient city walls is farm land with NO indication of ever being a major city. Even the Akrocorinth which was Corinth's formerly impregnable citadel has only its outer walls with all the structure within razed to the foundations (including unfortunately the Temple of Aphrodite). They say if Los Angeles was evacuated today and left vacant (a pleasant thought) then within 10,000 years there would be no surface trace left that anyone ever lived there. I presume there would still be traces in LA's vast garbage dumps but that's another story.

Gary