Hearings on Massachusetts' recreational marijuana begin in the Statehouse in Boston Monday, where lawmakers will mull potential changes to the voter-approved legislation legalizing marijuana use among adults and paving the way for commercial sale of the drug.

In 2016, we saw four states successfully legalize recreational cannabis and eight states approve new medical policies.

In 2016, we saw four states successfully legalize recreational cannabis and eight states approve new medical policies.

The experiences of Colorado and Washington state — the first two states to legalize the drug still considered illegal under federal law — drive the trend.

The experiences of Colorado and Washington state — the first two states to legalize the drug still considered illegal under federal law — drive the trend.

BISMARCK — A Senate bill rewriting language of Measure 5 would institute $300 fees for applicants wanting medical marijuana cards and a $100,000 fee for certification of compassion centers that would manufacture and dispense the substance.

BISMARCK — A Senate bill rewriting language of Measure 5 would institute $300 fees for applicants wanting medical marijuana cards and a $100,000 fee for certification of compassion centers that would manufacture and dispense the substance.

LAS VEGAS (KSNV News3LV) — Country music legend and marijuana advocate Willie Nelson launched a new line of marijuana products in Las Vegas this week.

San Diego legalized recreational pot dispensaries on Tuesday and the city also opened up the possibility it will allow pot farms, manufacturing facilities and testing labs.

State regulators and government officials involved in crafting rules for the budding legal and medical marijuana industry are going to pot.

State regulators and government officials involved in crafting rules for the budding legal and medical marijuana industry are going to pot.

AUGUSTA, Maine (NEWS CENTER) -- Recreational marijuana is officially legal in Maine as of Monday; adults 21 years and older can now possess two-and-a-half ounces of weed.

AUGUSTA, Maine (NEWS CENTER) -- Recreational marijuana is officially legal in Maine as of Monday; adults 21 years and older can now possess two-and-a-half ounces of weed.

The votes were counted, the oath was taken and Donald Trump became the 45th president of the United States Friday. However, a new president isn’t the only thing Americans received as a result of the 2016 election — a slew of citizens got sweet changes to marijuana laws after nine states legalized cannabis in some capacity.

The votes were counted, the oath was taken and Donald Trump became the 45th president of the United States Friday. However, a new president isn’t the only thing Americans received as a result of the 2016 election — a slew of citizens got sweet changes to marijuana laws after nine states legalized cannabis in some capacity.

DENVER (AP) -- Denver is starting work on becoming the first city in the nation to allow marijuana clubs and public pot use in places such as coffee shops, yoga studios and art galleries.

DENVER (AP) -- Denver is starting work on becoming the first city in the nation to allow marijuana clubs and public pot use in places such as coffee shops, yoga studios and art galleries.

DC marijuana (DCMJ), a pro-marijuana legalization group, plans to "gift" 4,000 joints on inauguration day on the streets of Washington, D.C., encouraging the public to light them up at the 4:20 mark of the new Trump administration.

DC marijuana (DCMJ), a pro-marijuana legalization group, plans to "gift" 4,000 joints on inauguration day on the streets of Washington, D.C., encouraging the public to light them up at the 4:20 mark of the new Trump administration.

With recreational marijuana use on the verge of becoming legal in Maine, real estate brokers are seeing a jump in demand for industrial spaces that could become indoor marijuana farms in the not-too-distant future.