Learn About Marijuana
Science-based information for the public

Factsheets About Marijuana

Some of the factsheets below are reprinted or adapted from the National Cannabis Information and Prevention Centre (NCPIC) in Australia (now called Cannabis Information and Support, and from other sources.  We are currently reviewing and updating the pages to include information specific to Washington state and the U.S.

General Topics

Data and Surveys

Health Effects

Marijuana Use Disorders