Legal weed is big business.

The North American marijuana market posted $6.7 billion in revenue in 2016, up 30% from the year before, according to a new report from Arcview Market Research, a leading publisher of cannabis market research.

The so-called green rush shows no sign of slowing down.

Arcview projects sales will grow at a compound annual growth rate of 25% through 2021, when the North American market is expected to top $20.2 billion.

In the last few years, attitudes to marijuana in the U.S. appeared to be easing.

And in many ways, they have. Four states have fully legalized recreational cannabis, and four more voted to follow them in November.

But the same election that doubled the number of pot-tolerant states brought Donald Trump into the White House. With him come people in key cabinet positions who loathe marijuana and have at least some power to act on it. Marijuana is still illegal under U.S. federal law.

Almost three-quarters of veterans using medical marijuana will feel the impact this spring when the federal government imposes a new limit on the amount of weed for which it will pay.

The report says one in three uses 10 grams — the current maximum daily allotment.

The figures are contained in an internal Veterans Affairs Canada audit that raises broad questions about the use of pot by veterans, including claims that it reduces the use of painkillers and other addictive drugs.

A study out of the University of California, Davis has provided new insights into how marijuana legalization affects teenagers' perceptions and use of the drug.

Researchers found that among Grade 8 and 10 students in Washington State, marijuana use increased after the drug was legalized. 

Attitudes were also affected. The study's findings showed teenagers were less concerned about the harms associated with marijuana after the law changed.

Results varied among slightly older students. Among Grade 12 students, no shift in attitude or use was reported.

In Colorado, where marijuana was legalized in 2012, the study's results were also different. Researchers found no change in attitude or use of marijuana after legalization — for any age group.

A vote over the holidays puts the brakes on recreational pot shops.

It’s been two weeks of ups and downs for those celebrating Massachusetts’ new legal marijuana law. While many were taking their first-ever fully legal puffs inside their living rooms over the holidays, lawmakers gathered almost completely without public scrutiny to slow things down—keeping in place, for a little while longer, a temporary system that allows adults to possess and use marijuana, but not to sell it or to buy it in a store.

In less than two weeks, on January 15th, cannabis becomes legal for those 21 and older in Maine.

This is thanks to portions of Question 1 taking effect. With a possession limit of 2.5 ounces, it’s the most progressive of the eight states that have legalized cannabis. The seven other states have a limit of one ounce, though Oregon and Massachusetts allow more at a private residence.

A new report, seeking to understand if perceptions about marijuana use are changing with the greater liberalization in the U.S., has found the most significant affect to be among eighth- and tenth-graders.

The research is focused on Washington (Washington and Colorado became the first two states to legalize recreational use of marijuana for adults in 2012). The influence of the legalization on young people, and in shaping societal attitudes in general, has for a while being the topic of the debate. The research, conducted by the University of California Davis School of Medicine, set-out to separate fact from fiction.

Some marijuana users in Colorado are experiencing a mysterious illness. 

And while it hasn't reached California It could eventually make its way here.  

Recreational use of the drug has been legal in Colorado for three years.

And its use for medical purposes has been allowed for even longer. 

But one emergency room doctor says he's seeing an increase of patients with specific cannabis-related symptoms such as recurring nausea, vomiting, and abdominal cramps. 

He believes it occurs among those who consume large amounts of the drug. 

Doctors say moderation is key when it comes to marijuana use. 

Dispensary owners agree and say if taken correctly marijuana can help relieve medical conditions such as seizures and pain management. 

Los Angeles residents awoke Sunday morning to find one of the city’s iconic landmarks had been updated with the changing of the years: the famous Hollywood sign had been modified to read “Hollyweed.”

According to a report from the Los Angeles Police Department, security cameras captured footage of a lone individual dressed in black tactical-style clothing climbing the mountain on which the sign sits. According to Sergeant Guy Juneau, the prankster then scaled the sign and used tarpaulins decorated with a peace symbol and a love heart to change the O’s to E’s.

#HOLLYWEED PC: @elroobs

If you support the legalization of marijuana, 2016 didn't give you much to complain about. Last year, residents in four states approved recreational-marijuana ballot initiatives, doubling the total from the end of 2015, while five new states put medical-cannabis laws on their books. By year's end, 28 states and Washington, D.C., had legalized medical pot.