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Ongoing coverage of states' legalization of marijuana, marijuana effects and medical marijuana usage in the US.

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Will Las Vegas Be 'Amsterdam on Steroids'? Door Opens for Pot Lounges Will Las Vegas Be 'Amsterdam on Steroids'? Door Opens for Pot Lounges Will Las Vegas Be 'Amsterdam on Steroids'? Door Opens for Pot Lounges Will Las Vegas Be 'Amsterdam on Steroids'? Door Opens for Pot Lounges

'Amsterdam on Steroids': Door Opens for Vegas Pot Lounges

John Locher / AP
Cannabis Company Plans to Turn Entire California Desert Town Into Pot Paradise Cannabis Company Plans to Turn Entire California Desert Town Into Pot Paradise Cannabis Company Plans to Turn Entire California Desert Town Into Pot Paradise

A New Joint: California Town to Become All-Pot Paradise

Paul J. Richards / AFP/Getty Images
Vermont Governor Plans to Veto Bill That Would Legalize Marijuana Vermont Governor Plans to Veto Bill That Would Legalize Marijuana Vermont Governor Plans to Veto Bill That Would Legalize Marijuana

Here's Why Vermont's Governor Won't Legalize Pot

Denver Voters Approve Marijuana Use in Bars. But There's a Catch

Utah Governor Candidate Mike Weinholtz Wants Drug Reform After Wife's Marijuana Arrest

These Nine States Will Vote on Legalizing Recreational and Medical Marijuana

First-Ever Marijuana Fair Opens in Oregon with Competition

Drug Enforcement Administration Will Not Call for Reclassifying Marijuana

Battle Over Georgia's 'No-Buzz' Medical Marijuana Law Gets Personal

'No-Buzz' Medical Pot Laws Prove Problematic for Patients, Lawmakers

Legal Marijuana Business Finds Its Footing, Despite Challenges

Emergency Room Visits Double for Marijuana-Using Colorado Visitors

Ohio Votes Down Legalizing Pot for Medical, Recreational Use

Between Pot and a Hard Place: Fed Rejects Colorado Marijuana Bank

High Hopes for D.C. Pot Growers as City, Congress Fight Over Law

Colorado Pot Taxes Will Be Waived on September 16

College Kids Smoked Pot More Regularly in 2014 than Cigarettes: Study

Marijuana Commerce Blossoms, But Challenges Abound

Pot Industry Bank Challenges Rejection by Federal Regulators

How to Legally Invest in Marijuana Companies

House Lawmakers Push Pro Medical Pot Measures

Protesters in NYC Call for Legal Marijuana in New York

Always On His Mind: Country Star Nelson Launches Marijuana Brand 'Willie's Reserve'

Uber Pairs Up With Marijuana Group to Offer 4/20 Discount for Stoners

Colorado Marijuana Study Finds Legal Weed Contains Potent THC Levels

Obama Says Pot Legalization Shouldn't Be Young People's 'Biggest Priority'

Hash Oil Explosions Related to Marijuana Pose Risk to Colorado Homes

Hazy Heads: Heavy Teen Pot Use Linked to Weaker Memories

Mayor Makes Inaugural Purchase at Country's First Government-Run Marijuana Shop

No High Risk: Marijuana May be Less Harmful Than Alcohol, Tobacco

Alaska Becomes Third State to Legalize Marijuana

Legalized: A Year in the Life of Recreational Marijuana in Colorado

Pediatric Academy Now Says Medical Marijuana May Help Some Ill Kids

Marijuana Use Has Increased in Colorado: Study

Contact High Court: Nebraska and Oklahoma Sue Over Colorado Pot Legalization

Driving While High? Researchers Developing Breath Test for Marijuana

Vice Wars: Tobacco, Alcohol and the Rise of Big Marijuana

Colorado Marijuana Stores Offer Seasonal Discounts on 'Green Friday'

Stir It Up: Bob Marley to Headline Corporate Cannabis Brand

Pot Legalizations Push U.S. Closer to Weed Business Boom

Pot at the Polls: Oregon, Alaska Cast Pivotal Votes on Legal Marijuana

Colorado Wants to Ban Pot Brownies, Cookies, Candies

House of Representatives Passes 'No Welfare for Weed' Bill

Colorado Recreational Pot Sales Eclipse Medical Pot for First Time

For Pot Delivery Apps, Making Green Means Wading Into Legal Gray Area

Marijuana Tourists: Are More Flocking to Washington and Colorado?

'Prince of Pot' Marc Emery Out of U.S. Prison, Back in Canada

Five Years to Life in Prison for Selling Pot Brownies?

New York Times To Run Ad From Marijuana Company

Colorado's Neighbors Grappling With Spike in Pot Seizures

Colorado Tightening Edible Pot Rules

Drug Driving? Congress Debates Dangers of Driving Stoned

Draw of Legal Weed in Colo. Behind Uptick in Homeless Teens?

New York Times Calls for Ending Federal Ban On Marijuana

House Votes to Allow Marijuana-Related Banking

Puff, Puff, Pink Slip: Legal Weed Use Still Carries Job Risk

Seattle City Attorney Apologizes for Taking Pot to Work

Seattle's Only Legal Marijuana Shop Sells Out of Pot

'Firing' Over Legal Marijuana Called Mistake, Man Gets Job Back

Pot Sales Begin (Legally) in Washington State

Lone Seattle Weed Shops Opens to Throngs of Pot Buyers

The Going Price for Pot in Seattle – and Elsewhere

Water-Guzzling Pot Plants Draining Drought-Wracked California

Washington State's First Legal Marijuana Shops Set to Open Amid Chaos

Berkeley to Require Free Medical Marijuana for Poor

Ex-New Mexico Gov. Johnson named pot company CEO

Washington State's First Licensed Marijuana Business For Sale

Detox Network Sees Pot DUIs Spike in Colorado After Legalization

Changing Pot Laws Prompt Child-Endangerment Review

High Times: The Next Five States to Tackle Pot Laws

DEA, Federal Government's Dealer, Goes Shopping for More Pot

Colorado Lawmakers Tackle Edible Pot Problem

Colorado Pot Regulators Eye Stricter Rules On Edibles

Colorado Symphony Hooks Up With Pot Industry

Retired Supreme Court Justice Stevens Backs Legalized Pot

'We're Not Amsterdam': Is Marijuana Tourism in Colorado a Myth?

Marijuana Re-Shapes Brains of Users, Study Claims

Student Dies in Colorado Fall After Eating Pot Cookie

'Out of Options': Veterans With PTSD Hit Pot Underground

Medical Pot Shops Bummed at Oregon's Munchies Ban

Money to Burn: Colorado Hauls in $2M in One Month of Pot Taxes

Colorado inhaled about $2 million in recreational marijuana taxes in January, first full-month revenue report of the fledgling recreational pot industry in the U.S., the state’s Department of Revenue reported on Monday.

Higher Ed: How Medical Marijuana Schools Are Taking Root in Fla.

As Florida debates whether to legalize medical marijuana in a ballot in November, some entrepreneurs are already cashing in.

Colorado Launches Campaign to Curb Stoned Driving

Colorado is spending $1 million on television ads making fun of marijuana users who space out during everyday tasks — an effort to stop stoned driving.

Treatment or Jail: Patrick Kennedy Wages Fierce Anti-Pot Crusade

Former Rep. Patrick Kennedy, a recovering drug addict, is launching an aggressive campaign against pot even as polls show public support for legalization.

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Denver's Pot Culture Gets Down to Business

From grow houses to smoking rooms, the legal marijuana industry in Denver is flourishing but increasingly dangerous.

"North To the Future" Alaska Could Be Next State to Legalize Marijuana

"North To the Future" is the official state motto of Alaska. That future may soon include the legal, recreational use of marijuana.


High Crimes: Robber Gangs Terrorize Colorado Pot Shops

The legal marijuana industry has become a magnet for criminals attracted to stashes of pot and cash.

Poll: Majority of Americans Support Efforts to Legalize Marijuana

Fifty-five percent of Americans say they support legislative efforts to legalize marijuana, according to a new NBC News/Wall Street Journal poll.

Buzz Abounds Over Denver County Fair's New Pot Pavilion

Seattle and Denver may be fairly well-matched in Sunday’s Super Bowl, but the latter has already laid claim to a bowl title of another sort.

Pot Buyers Add More Than $1M to Colorado Tax Coffers

In the first month of legal recreational marijuana sales in Colorado, retailers tell NBC News they took in $1.24 million in taxes.

Florida Supreme Court Puts Medical Marijuana on November Ballot

A Florida measure that would allow the use of medical marijuana has cleared its final hurdle to be placed on the November ballot.

State AG Says Washington Localities Can Ban Pot Stores

Washington state cities and counties can weed out pot stores even though voters approved them in a referendum, the state attorney general said Thursday.

Growing the Pot Industry: A Test of American Business Ingenuity

Now marijuana’s legal in Colorado, how do you build the pot industry? There's a green rush going on, led by “ganjapreneurs.”

Will Legal Weed Take a Pot Shot at Colorado's Craft Beer?

Will cannabis cannibalize beer sales in the state?

8 Things to Know About Buying and Smoking Pot in Colorado

As Colorado becomes the first state in the country to allow recreational marijuana sales starting Jan. 1, here's a primer on buying and using pot legally.

NY Governor to Ease Medical Pot Rules: Report

Gov. Andrew Cuomo plans to allow limited use of medical marijuana, the New York Times reports.