Voters in Colorado passed a referendum four years ago to make buying and selling marijuana legal, and Massachusetts voters are expected to do the same thing.

Voters in Colorado passed a referendum four years ago to make buying and selling marijuana legal, and Massachusetts voters are expected to do the same thing.

The Colorado Department of Agriculture is working on the world's first government-produced manual on how to grow marijuana.

The Colorado Department of Agriculture is working on the world's first government-produced manual on how to grow marijuana.

The lawmakers will take the lessons learned there and issue a report with recommendations to the senate president next month.

The lawmakers will take the lessons learned there and issue a report with recommendations to the senate president next month.