The economics of marijuana are simple and attractive. It costs an estimated $400 to grow a pound of pot. One pound sells for $2,500 to a middle man. It then yields $6,000 on the street. With low start-up and overhead costs, marijuana is the most profitable drug of all, according to local law enforcement officials. With that kind of profit margin, marijuana is increasingly filling the gap left by other failing industries like lumber and fishing. See the CNBC report here: http://www.msnbc.msn.com/id/28354324/