The United States is gradually becoming the land of the red, white, and green.
Nine states and Washington, DC, have legalized marijuana for recreational use — no doctor's letter required — for adults over the age of 21. Medical marijuana is legal in another 29 states.
Support for the drug reached new highs in 2017. A Gallup poll showed that 64% of Americans favor legalization, and even a majority of Republicans back it.
Here's a summary of where Americans can legally light up in 2018.
SEE ALSO: 23 health benefits of marijuana
Alaska

Adults 21 and over can light up in Alaska. In early 2015, the northernmost US state made it legal for residents to use, possess, and transport up to an ounce of marijuana— roughly a sandwich bag full — for recreational use. The first pot shop opened for business in late 2016.
Alaska has pounced on the opportunity to make its recreational pot shops a destination for tourists. More than two million people visit Alaska annually and spend $2 billion.
California

It was the first state to legalize medical marijuana back in 1996. California became even more pot-friendly in 2016 when it made it legal to use and carry up to an ounce of marijuana.
The law also permits adults 21 and over to buy up to eight grams of marijuana concentrates, which are found in edibles, and grow no more than six marijuana plants per household.
But not all Californians can legally smoke marijuana, depending on where they live. Many cities in the Central Valley, including Fresno and Bakersfield, have moved to ban recreational sales.
Colorado

In Colorado, there are more marijuana dispensaries than Starbucks and McDonalds locations combined. The state joined Washington in becoming the first two states to fully legalize the drug in 2012.
Residents and tourists over the age of 21 can buy up to one ounce of marijuana or eight grams of concentrates. Some Colorado counties and cities have passed more restrictive laws.
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