Pros of legal marijuana include: Billions of dollars in new tax revenue Lessened underage use Decreased cannabis prices Higher-quality weed Reduced revenue for black market sales Decreased policing of minority communities More jobs added to the economy   Potential adverse effects of marijuana on the body include: Increased heart rate Dizziness Cannabis use disorder and withdrawal symptoms Impaired concentration and memory Slower reaction times Negative drug-to-drug interactions Increased risk of heart attack and stroke Increased appetite Potential for addiction Hallucinations or mental illness Withdrawal symptoms