Recreational marijuana sales have officially begun in Colorado Springs following an uphill battle for dispensaries. Only ...

The map shows locations of medical and retail marijuana cultivation facilities in Colorado as of Oct. 1, 2015. Click a map marker for more information. Source: Colorado Department of Revenue / By ...

Other states where pot smoking is very popular included some more obvious candidates such as Colorado and Washington which have both legalized the recreational use of marijuana this year.

According to state data, marijuana sales across Colorado have generated nearly $2.5 billion in tax revenue since 2014.