The post discusses a study comparing the lung damage caused by smoking cigarettes versus marijuana, revealing that cigarettes have a more detrimental impact on lung health. While the author claims that CT scans reveal significant lung changes due to smoking, the conversation highlights concerns about the lack of emphasis on usage frequency and its effects on health outcomes. Additionally, some users mentioned their past experiences with mixing marijuana and tobacco and questioned whether this combination could amplify lung damage. Overall, the discourse indicates a need for deeper analysis and conclusive research on smoking behavior and health repercussions to fully understand the implications of both substances.