The only mystery about Chicago is why it's as (relatively) affordable as it is. The cost to live comfortably here is $68,67, more than $15,000 a year less than New York or LA, the other two of the three biggest cities in the nation. If you don't mind lake-effect snow, you should definitely consider locating here.
Marijuana dates way back; the first evidence of Marijuana smoke inhalation dates back to 3rd Millennium BC from the discovery of charred seeds found in a brazier located in Romania. The most famous ancient users of Marijuana were the Hindus who called it Ganjika (or Ganja). Other ancient users included the Assyrians, Scythians, Thracians, and Dacians who all used it in religious ceremonies. It is believed that the first Marijuana plants originated in the Middle East.
Well, silly, it comes from oil wells, of course! Sorry, that was just too easy to pass up (and in some respects the best answer out there)! Really now, where does oil come from? The truth is, no one is completely certain how oil originated, migrated and accumulated. Prevailing wisdom, based on over a hundred years of production history, has it that crude oil was formed from layers of dead organisms lying on the sea floor for millions of years.