already passed the Mexican Senate and is working its way thr already passed the Mexican Senate and is working its way through the lower house of Congress. It could be approved as early as this month.If and when that happens, says The Wall Street Journal, Mexico will in an instant become the world's largest legal cannabis market. And even that may not be the end of this trend.Once the United States is bracketed by two large nations, both of which permit recreational use of marijuana, the pressure for federal legalization in the U.S. will naturally increase.