The analysis is based on 2016 data from the 15 states that reported the reasons given for using marijuana.
University of Colorado Anschutz scientists are using a driving simulator to find out how drugged driving affects people individually.
The criminal verdict was the culmination of a legal battle stemming from the church’s first 420 celebration. Steve Berke has to pay a $71 fine.
The case has wound through the courts after undercover Denver Police officers infiltrated a 4/20 celebration at the church in 2017.
The Denver marijuana enterprise made large amounts of money from "looping," a practice where some customers would repeatedly return to the same store to buy marijuana intended for black market sale.
However, as more young people use alcohol and marijuana, they're also regarding those two substances as less dangerous.
El Paso recreational cannabis customers have to either shop in the quaint resort town of Manitou Springs, or take I-25 south to Pueblo or north to Denver.
In Boulder, 13 people have applied and four were eligible for an expungement. In Denver, 48 people have applied so far.
The program will help people vacate convictions for any marijuana offense now legal under state law. The city estimates around 10,000 convictions could be eligible.