Authorities said Friday they raided hundreds of black market marijuana operations in Colorado that flouted the state’s cannabis law by growing tens of thousands of plants in Denver-area homes and selling the drugs out of state. Investigators seized more than 80,000 plants and 4,500 pounds (2,040 kilograms) of harvested marijuana, state and federal prosecutors said at a news conference. Officers raided 247 homes and eight businesses and arrested 42 people in Denver and seven nearby counties. State law allows up to 12 marijuana plants per residence for personal use, but some of the homes had more than 1,000 and many...