This map shows every US state where pot is legal

• Marijuana legalization initiatives swept the US last year. 
• President Donald Trump signed the Farm Bill into law in December of last year, which legalized hemp. 
• Michigan became the 10th state to legalize recreational marijuana during last year's midterm elections. Utah and Missouri both voted to legalize medical marijuana.
• Recreational marijuana is now legal in 10 states; medical marijuana is legal in 33.

Marijuana legalization swept the US last year. 

President Donald Trump signed the bipartisan Farm Bill into law in December of last year, which legalized hemp — a plant that's roughly identical to marijuana but doesn't contain THC, a psychoactive compound in marijuana — nationwide. 

Hemp is also a source of CBD, or cannabidiol, a popular, if scientifically untested ingredient in many cannabis-infused products. 

Read more: One of the largest publicly traded marijuana companies says the Farm Bill provides a 'pathway' for entering the lucrative US market

In last year's midterm elections, Michigan became the 10th state to legalize recreational marijuana, and Utah and Missouri voted to legalize medical marijuana.

Deep-red Oklahoma also voted to legalize medical marijuana last year, joining numerous other states that have such laws on the books.

Vermont became the first state to legalize marijuana through its Legislature last year as well, rather than a ballot initiative when the governor signed the bill into law.

Ten states and Washington, DC, have now legalized marijuana for recreational use for adults over 21. And 33 states have legalized medical marijuana.

Read more: The top 12 venture-capital firms making deals in the booming cannabis industry that's set to skyrocket to $75 billion

Marijuana prohibition began 80 years ago when the federal government banned the sale, cultivation, and use of the cannabis plant. It remains illegal at the federal level.

Overturning prohibition is one of the few hot-button topics with widespread support.

A recent poll by the Pew Research Center found that 62% of Americans, including 74% of millennials, said they supported legalizing marijuana.

Last year was also a banner year for marijuana legalization globally. 

Last, October Canada legalized marijuana federally, becoming the first G7 country to do so.

Mexico's Supreme Court also ruled that marijuana prohibition is unconstitutional, paving the way for the country's new leader, Andrés Manuel López Obrador, to follow Canada's lead.

Melia Robinson contributed to an earlier version of this post. 

SEE ALSO: Marijuana companies are using a 'backdoor' strategy to tap the public markets — and it's fueling an M&A boom

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

California 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.

Getting Californians to buy legal weed — rather than from the black market — has been challenging since the law took effect, The New York Times reports. 

Colorado