Thanks, Christy, for the notes on Wes Jackson's talk.  On a minor point, I picked up on the '1 nuclear accident every 10 years' estimate.  As a coastal marine ecologist, I figured out that (around the NW European coastline) we have averaged one severe winter and one serious oil-spill every ten years.  Is there something special about this period ?  I seem to remember that the sunspot cycle runs over 11 years (near enough ?).    Tony N-S.

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