MEXICO CITY - Mexico, a country carved up by cartels for decades, is poised to take a major step in drug policy. This week, the lower house of Congress approved a landmark bill to legalize recreational marijuana, which would make it the world's largest legal market for the drug. With legalization considered all but certain to win Senate and presidential approval, many in the business world are predicting a Mexican green boom: a newly legal industry providing tens of thousands of jobs, millions of dollars in profit for savvy entrepreneurs and welcome tax revenue for the government. [continues 1065 words]