The first day of recreational marijuana sales in the state of Colorado was a huge monetary success, shops said, bringing in more than $1 million in recreational and medical pot sales. Many await what will happen on day two and beyond after Colorado became the first U.S. state to sell legal recreational weed. Washington has also legalized the drug, but sales will not begin until later this year. In 18 other states, medical marijuana is legal.

Worldwide, Colorado is on the forefront of the legalization movement. In the Netherlands, marijuana is technically illegal, but has been widely smoked in Amsterdam and other parts of the country since 1976 when it was informally decriminalized. In December last year, Uruguay became the first country to legalize the cannabis industry, but it has yet to implement the law.