Mason Tvert and Doris C. Gundersen discuss benefits and disadvantages of marijuana legalization March 13, 2021 cbdnews Marijuana Medical Benefits Comments Off on Mason Tvert and Doris C. Gundersen discuss benefits and disadvantages of marijuana legalization CGTN’s John Terrett spoke with Mason Tvert, media relations director for Marijuana Policy Project and Doris C. Gundersen, medical director of Colorado …