Thats not exactly what it says: “An important factor that helps explain the difference in effects from these two substances is the amount of each that is typic

Thats not exactly what it says: “An important factor that helps explain the difference in effects from these two substances is the amount of each that is typically smoked,” Pletcher said. “Tobacco users typically smoke ten to 20 cigarettes/day, and some smoke much more than that. Marijuana users, on average, smoke only two to three times a month, so the typical exposure to marijuana is much lower than for tobacco.”