I live in south FL and Its hard for me to "know my grower" but the stuff I've been getting for years is really high grade & potent, never mids or regs. Since I dont live in a medical state I'm guessing most street weed even though its a high quality is still sprayed with all types of pesticides and chemicals. Are you guys who buy street weed and don't know who grows it worried about the long term effects from the pesticides and chemicals? And do you think vaporizing even helps? I couldn't find any info on chemicals in weed increasing cancer risk. I wish I knew this years ago, I would have moved or started growing.