Detroit did Meat Free Days way before the McCartneys!
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https://www.facebook.com/photo.php?fbid=10150844590815510&set=a.10150160836885510.408606.249015940509&type=1&theater thought some might find that meat free day poster from Detroit interesting. This was back in WWII.
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The McCartney's didn't invent it, they promote it.
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actually, this poster was from WWI not II. the McCartney's were the ones who came up with the MFM campaign.
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Yes, most people had meat free days during war-time.