Could marijuana be the answer to the economic misery facing California? Democratic State Assembly member Tom Ammiano thinks so. Ammiano introduced legislation last month that would legalize pot and allow the state to regulate and tax its sale — a move that could mean billions for the cash-strapped state. Pot is, after all, California's biggest cash crop, responsible for $14 billion in annual sales, dwarfing the state's second largest agricultural commodity — milk and cream — which brings in $7.3 billion annually, according to the most recent USDA statistics.