I will give you 5 things to learn, that you might not know: 1. THC and CBD, marijuana's primary cannabinoids, are both cancer killers. 2. Marijuana triggers neurogenesis. Layman's terms: It leads to brain cell growth. 3. Suicide rates are lower in areas where medical marijuana is available. 4. There is zero evidence that marijuana causes significant lung damage. 5. There are two completely different types of marijuana, both with different effects on the user.