Sam Harnett | | KQED 

California voters have approved Proposition 64, legalizing recreational use of marijuana in the nation’s most populous state and along the entire West Coast.

The vote marks a change in drug policy decades in the making and indicates growing momentum for other states to legalize marijuana for either recreational or medical use. Though California was first in the U.S. to allow medical use, it follows Alaska, Colorado, Washington, Oregon and Washington, D.C. in legalizing recreational marijuana.

Californians got their first chance to vote on whether to legalize marijuana in 1972, and they overwhelmingly said no. The state came close in 2010, when the final vote was 53.5 percent for and 46.5 percent against. Since California became the first state to legalize medical marijuana in 1996, more than two dozen states have followed suit.

The donations for Proposition 64 have been lopsided. The state’s Fair Political Practices Commission calculates that over $20 million has been spent by those who want to see the measure passed. Meanwhile, opponents have kicked in only $2 million. The campaign to legalize appeared much more organized this go-round, and it has been ahead in the polls for months.

Proponents of Proposition 64 say the measure would finally bring the marijuana industry out into the open. They have been pitching the proposition as a thoughtful measure that takes lessons from other states that have legalized. Supporters stress that there are protections to prevent monopolies from forming in the marijuana business, and that legalizing would bring a windfall of new tax revenue for the state. The California Department of Finance estimates that the measure could bring in $1 billion a year through taxes on the cultivation and sale of cannabis.

Opponents have raised concerns that range from public safety impacts to moral qualms. On the public safety side, the No on 64 campaign has sounded alarms about the possibility of increased teen drug use, the corporatization of marijuana, secondhand smoke and DUIs. The determination of what constitutes “drugged driving” has become a big issue. How high is too high to drive? There’s currently no answer to that question.

Cannabis growers in places like Humboldt and Mendocino counties are divided on the issue. Some are happy to finally be able to go legit after decades of friction with law enforcement. But there is a lot of concern. Many worry that large corporations are going to get into the business — players from Big Ag, tobacco and alcohol — and that the cultivator culture in the Emerald Triangle will be snuffed out. At the very least, many are afraid legalization would cause the price of marijuana to continue to drop, making it impossible for small growers to earn a living. Some are dubbing the potential change as the “Wal-Martization of weed.”

Proposition 64 leaves a lot of questions about the marijuana industry on the table. It is still a Schedule 1 narcotic federally. Those in the marijuana business will have difficulties when it comes to banking and can’t transport the drug across state lines. Many of the regulatory decisions about the cultivation and sale of marijuana will be left up to local authorities. Some locations may, in fact, choose to ban the sale of marijuana entirely.