The 6th International Conference of IGAC was held in the Italian city of Bologna from the 13th -19th September 1999.  I.G.A.C. stands for "International Global Atmospheric Chemistry" program. Much of the work of IGAC is carried out at the various Antarctic stations with the "Hot Topics" at present being Global Warming, Greenhouse Gasses, Air Pollution, Ozone depletion, The Antarctic Ozone Hole and Ice Cap Melting.

One of the keynote speakers was Professor Paul Crutzen of the Max Plank Institute in Germany who in 1995 won the Nobel Prize in Chemistry for his work on the causes of the Antarctic Ozone Hole.

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BOLOGNA 1.  Specially printed IGAC cover with cachet for conference posted on first day.    Price US$4

Note the cover above also has at left an Italian Antarctic cachet and on the reverse an Italian Antarctic Program sticker and "OZONE" cachet as shown below. Backstamped on arrival in Christchurch 20 September 1999.

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Reverse side of cover above showing Italian Antarctic sticker.

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BOLOGNA 2.  Similar cover but with "Ozone" cachet on front.    Price US$4

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Professor Paul Crutzen, Director of the Max Plank Institute in Germany.

In 1995 he won the Nobel Prize for chemistry for his work on the Antarctic ozone hole.

He was a keynote speaker at IGAC.

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BOLOGNA 4  Cover autographed by Nobel prize winner Paul Crutzen     Price US$10

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