https://peertube.dngr.us/videos/watch/24513b47-b876-4b2f-a75f-849a310fad17 Join this channel to get access to perks: https://www.youtube.com/channel/UCddem5RlB3bQe99wyY49g0g/join Join us on Patreon. Visit https://www.patreon.com/PeriscopeFilm Visit our website www.PeriscopeFilm.com Dating to 1982 and produced by BFA, "Marijuana Alert!" was produced for viewing by school-age children. Featuring testimony from the public, as well as interviews with doctors, marijuana researchers, and other experts, this documentary argues that marijuana is a harmful drug that can impact lung function, brain function, and overall health. 00:00 The film introduces the common misconception that marijuana is harmless, contrasting it with scientific findings that it affects every organ tested, including the lungs, heart, and brain. 1:22 Patrick, a college student, undergoes tests to measure physical and mental performance before and after smoking marijuana, revealing slower running times, more driving mistakes, and significantly lower aptitude test scores when under the influence. 3:34 Marijuana is described as a stubborn substance whose resin sticks to organs and can remain in the system for up to 10 weeks, collecting in various parts of the body, including male and female reproductive organs. 4:33 A 4-year study on rhesus monkeys by Dr. Sassenrath found that daily THC exposure during pregnancy led to over 40% pregnancy loss, prompting her to advise expectant mothers against marijuana use. 6:32 The film highlights that marijuana smoke contains 420 chemical compounds, including cancer-causing agents like benzanthracene and benzopyrene, and is inhaled deeper and held longer than cigarette smoke, making it potentially more damaging to the lungs than tobacco. 7:47 Dr. Barry Calverley's 5-year study on chronic marijuana smokers revealed changes in lung function linked to early signs of emphysema, bronchitis, and lung cancer, with evidence of premalignant cells found in the lungs of marijuana-smoking soldiers killed in Vietnam. 9:42 The effects of marijuana on the heart are documented, including high blood pressure, increased heartbeat, blackouts, and in severe cases, stroke, with a personal account illustrating a dangerous reaction. 10:30 Basil's test demonstrates a significant increase in blood pressure and heart rate after smoking one joint, putting him at risk of blood vessel damage and stroke. 12:47 The film warns that marijuana is increasingly being coated with other powerful drugs like PCP (angel dust), leading to severe effects like inability to concentrate and prolonged recovery, as shown in Donna's case. 14:10 The brain is identified as the organ, after the lungs, that receives the largest concentration of marijuana residue, leading to memory loss, concentration difficulties, altered thought patterns, and behavioral changes by decreasing messages between brain cells. 15:49 Dr. John Hanley's study at UCLA using an EEG machine found persistent changes and decreased energy in the brain wave patterns of marijuana smokers, suggesting long-lasting effects on brain function. 17:27 The film concludes with personal testimonies from former users who experienced negative physical and mental side effects, leading them to quit and subsequently report improved well-being and academic performance, reiterating that marijuana is not a harmless drug and urging viewers to avoid it. Motion picture films don't last forever; many have already been lost or destroyed. For almost two decades, we've worked to collect, scan and preserve the world as it was captured on 35mm, 16mm and 8mm movies -- including home movies, industrial films, and other non-fiction. If you have endangered films you'd like to have scanned, or wish to donate celluloid to Periscope Film so that we can share them with the world, we'd love to hear from you. Contact us via the weblink below. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com Source: https://www.youtube.com/watch?v=_1WLF7gf7z4 Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm) Sat, 13 Jun 2026 13:25:14 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/41a6fee9-7f57-42d0-a5fc-5db4f1af2e31.png https://peertube.dngr.us/videos/watch/24513b47-b876-4b2f-a75f-849a310fad17 All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.