Legalizing Marijuana and the New Science of Weed (Video) (image) American Chemical Society Share Print E-Mail Caption Marijuana buds are often two to three times as potent as they were 30 years ago. (An ACS video on this topic is available here http://bit.ly/MarijuanaTestingACS.) Credit Charas Scientific (for the photo) and American Chemical Society (for the video) Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.