If you see a 28-foot-high marijuana joint fashioned from a car on the side of the Courtyard Marriott at 934 16th Street, don’t be alarmed — or inspired. Part of a giant billboard installed today, the joint is just the latest ploy by the Colorado Department of Transportation to push its  Dangerous Combinations campaign.

The campaign, which launched in May, is part of the larger Drive High, Get a DUI program, and is designed to cut down on the number of people driving while high. Drive High, Get a DUI was established soon after Colorado legalized recreational marijuana; the first year of the program worked to educate people that they could get a DUI if they drove high.

The who’s who of Colorado’s marijuana industry gathered Saturday night for the unveiling of Willie’s Reserve, Willie Nelson’s cannabis company.

To launch his new product, Nelson hosted two kick-off concerts, one last week in Washington state and another on Saturday, July 30, at Fiddler’s Green Amphitheatre in Greenwood Village, Colorado.

“This event’s been a collection of the people that support the ideals of Willie Nelson. It’s a collection of people that understand that music and cannabis and culture and society all blend together really well,” says pioneering ganjapreneur Kayvan Khalatbari, who’s been working with Willie’s Reserve.

Alzheimer’s is a chronic neurodegenerative disease that slowly shuts down the brain and eventually leads to death. But a new study gives patients and their families hope that marijuana could help.

Researchers at the Salk Institute of Biological Studies published astudy in the June journal of Aging and Mechanisms of Disease announcing the discovery of a compound present in marijuana that triggers the removal of beta-amyloid protein from neurons. In layman’s terms, that means cannabis could help remove deadly plaque accumulation from the nerve cells.

There wasn’t much talk of marijuana inside the arena at this year’s Democratic National Convention.

The industry was all over Philly.

The following is excerpted from the newsletter WeedWeek. Get your free and confidential subscription at WeedWeek.net.

Marijuana wasn’t often mentioned in the Democratic National Convention’s official program.

Unofficially, it was the “star.” A trade association had a party. MPP had a fundraiser. Marchers carried a 51-foot joint.

At Marijuana.com, Tom Angell (@TomAngell) unearthed the Tim Kaine quote, “I actually kind of like this option of the states as labs and they can experiment [with legalizing]and we can see what happens.” NORML revised its rating on the vice presidential candidate from F to C. (Last week, I referred to MPP ratings for presidential candidates as NORML ratings. I regret the error.)

Marijuana Business Daily interviews former U.S. deputy attorney general James Cole, whose eight-point 2013 memo gave the industry confidence that it could grow without federal prosecution. “It wasn’t really intended to be a huge policy shift as much as reacting to the situation and trying to use some common sense,” he said.

California Lt. Gov. Gavin Newsom (D) wants more lawmakers to support legalization.

Former Massachusetts Congressman Barney Frank (D) said heroin and crystal meth should be legalized. “We should outlaw a drug if it is likely to make you mistreat others. People don’t hit other people in the head because they’re on heroin; they hit other people in the head because they need to get money to buy heroin.”

The New Yorker profiles Gary Johnson, the Libertarian Party’s presidential candidate and a legalization supporter. He said he would not use cannabis as president.

Quartz introduces us to Tick Segerblom (D), a dogged cannabis supporter in the Nevada State Senate.

The U.S. Trademark Trial and Appeals Board said cannabis sellers can’t receive federal trademark protection.

Illinois Gov. Bruce Rauner (R) decriminalized possession, making the state the third largest after New York and California to do so.

About half of the 100 Oregon communities that don’t allow REC businesses will vote on whether to lift their bans in November.

Ohio legislators knew that the provision in the state’s MED law to guarantee 15% of business licenses might be unconstitutional but they kept it in to win votes, the AP reports.

Florida billionaire Carol Jenkins Barnett, a Publix supermarket heir, donated $800,000 to oppose the state’s MED initiative.

A Los Angeles county ballot initiative that proposed a pot tax to benefit the homeless has been shelved. Canna Law Blog dives into the business climate in L.A, one of the world’s largest cannabis markets.

The DEA compared home grows to “meth houses.”

Italian lawmakers are beginning to debate legalization. Opponents include Pope Francis. The Italian military grows MED for the country.

Alzheimer’s is a chronic neurodegenerative disease that slowly shuts down the brain and eventually leads to death. But a new study gives patients and their families hope that marijuana could help.

Researchers at the Salk Institute of Biological Studies published astudy in the June journal of Aging and Mechanisms of Disease announcing the discovery of a compound present in marijuana that triggers the removal of beta-amyloid protein from neurons. In layman’s terms, that means cannabis could help remove deadly plaque accumulation from the nerve cells.

They may have been the first weed dealers.

The following is excerpted from the newsletter WeedWeek. Get your free and confidential subscription at WeedWeek.net.

Evidence suggests that Bronze Age Yamnaya tribespeople established a cannabis trade between Europe and Asia 5,000 years ago. Native to the Caucasus Mountains (roughly), the Yamnaya were horse-riding, cattle-herding nomads who traveled along what later became the Silk Road.

While neighbors Indonesia and the Philippines escalate their wars on drugs, Thailand may reform its famously harsh laws.

Can you find weed growing in the wild? Green Rush Daily investigates.

The Cannabist interviews joint rolling artist Tony Greenhand.

Eugene Monroe, who got cut from the Baltimore Ravens this year after he became the first active NFL player to call for MED use, has retired from the league. He’s one of jocks included on the Men’s Journal list of 18 cannabis activists in sports. The only woman is mixed martial artist Ronda Rousey. Earlier this year The New Yorker discussed “ The athlete’s case for cannabis.”

Tabloid stories about the dangers of drugs appear to fuel greater drug use. Gatherings where everyone stays sober are becoming trendy.

Agneya Singh, director of “ M Cream,” a movie billed as Bollywood’s first stoner flick, says India should decriminalize.

This weekend’s Enchanted Forest Gathering, a rave in northern California, was among the first U.S. festivals to have a MED dispensary on site. Alcohol was not sold.

Clothing company Patagonia, has made a short film ”Harvesting Liberty” to support industrial hemp legalization.

Michael “Dooma” Wendschuh, the central figure in my story “ Ebbu and the rise and fall of a modern weed dealer” has a new cannabis company. According to its LinkedIn page, Toronto-based Province Brands is a “global luxury brand” creating products “which do not feel like marijuana products.”

Some schoolchildren in the U.K. are gardening with cannabis compost.

The Washington Post learned that Maryland state lawmaker Del. Dr. Dan K. Morhaim, a vocal supporter of legalizing MED, is affiliated with a company applying for a state MED license. Morhaim, who’s also a physician, said he has no equity in the company, and had cleared his involvement with the legislature’s ethics advisor.

Maryland has promised to begin awarding the coveted licenses next month. The evaluation process cost about $2 million , almost five times the original estimate.

More rigorous product testing is coming to Oregon this fall, but so far  no testing lab licenses  have been issued. MED dispensaries  can open in Hawaii  but none are ready.

Tech billionaire Sean Parker doubled his contribution to California’s REC initiative to $2.25 million.

Long Beach, Calif. won a lawsuit that will allow it to maintain its dispensary ban. Voters will have a chance to overturn the city’s ban in November. It’s complicated.

High Times says Brexit could set back legalization in the U.K.

Italian lawmakers will consider full legalization. Greece may legalize MED. A new bill in Ireland would legalize MED.

Legal pot probably isn’t as big a draw for Colorado tourists as had once been thought. Seattle alt-weekly The Stranger makes a technical argument that Washington State should have licensed more dispensaries.

Edibles company Bhang Chocolate lost a $1.875 million breach of contract suit to investor Mentor Capital.

HelloMD, a site that allows patients to obtain doctors’ recommendations online, has a questions and answers site that TechCrunch compares to “ Quora for cannabis.”

Canadian company Canopy Growth, plans to start selling MED in German pharmacies.

Weed is among the highest grossing products on the “ dark web,” online marketplaces that are difficult for law enforcement to track.

Investment in cannabis start-ups is on the rise. Instagram “ purged” a few big brands’ accounts.

The Atlantic talks to a few female cannabis entrepreneurs.

Canna Law Blog has a post on the eight pitfalls awaiting the industry in California.

Dispensary chain Terrapin Care Station acquired Denver Relief’s central Denver store.