Researchers Explain How Marijuana Has Different Effects on People. by drgreencerts | Jul 16, 2019 | News | 0 comments Twitter Facebook Researchers at Western University in Ontario conducted a study to determine why marijuana can make one person happy while another paranoid. Click here to read more. Submit a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.