Probably some government studies. So I won't waste my time looking them up for you.
But, let's have some fun and guess.
On the one side we have tobacco, linked to cancer. Then we have homegrown marijuana with 50% more carcinogens than tobacco, 4X the tar, unfiltered smoke drawn deep into the lungs and held there, smoked allllll the way down to the last crud-filled molecule ... I don't know. Whaddya think? Think maybe there might also be a link to cancer?
It took decades of cigarette smoking by millions of Americans before the links between tobacco and lung cancer and other lung diseases were shown.
They proved a link between saccharin and bladder cancer, too.
"On the one side we have tobacco, linked to cancer. Then we have homegrown marijuana with 50% more carcinogens than tobacco, 4X the tar, unfiltered smoke drawn deep into the lungs and held there, smoked allllll the way down to the last crud-filled molecule ... I don't know. Whaddya think? Think maybe there might also be a link to cancer?"
Chemicals in Tobacco
In addition to nicotine, cigarette smoke contains over 4,000 different chemicals. The vast majority of these chemicals are added to the tobacco to add to its addictiveness, improve its flavor, and/or to increase burn rate, which increases sales.
Here’s one example of a chemical added specifically to make tobacco more addictive:
Ammonia (one of the 4,000 chemicals placed in cigarettes) is added solely for the purpose of enhancing the effects of nicotine. Ammonia added to commercially made cigarettes can boost the impact of nicotine 100 times. -- (The Washington Post, July 30, 1997)
Following are some of the categories of chemicals found in each cigarette:
Cancer Causing Agents
Nitrosamines
Crysenes
Cadmium
Benzo(a)pyrene
Polonium 210
Nickel
P.A.H.s
Dibenz Acidine
B-Napthylamine
Urethane
N. Nitrosonornicotine
Toluidine
Metals
Aluminum
Zinc
Magnesium
Mercury
Gold
Silicon
Silver
Titanium
Lead
Copper
Acetone
Nail Polish Remover
Acetic Acid
Vinegar
Ammonia
Floor/Toilet Cleaner
Arsenic
Poison
Butane
Cigarette Lighter Fluid
Cadmium
Rechargeable Batteries
Carbon Monoxide
Car Exhaust Fumes
DDT/Dieldrin
Insecticides
Ethanol
Alcohol
Formaldehyde
Dead Body Preserver
Fabric Preserver
Hexamine
Barbecue Lighter
Hydrogen Cyanide
Gas Chamber Poison
Methane
Swamp Gas
Methanol
Rocket Fuel
Napthalene
Mothballs
Nicotine
Insecticide
Addictive Drug
Nitrobenzene
Gasoline Additive
Nitrous Oxide Phenols
Disinfectant
Stearic Acid
Candle Wax
Toluene
Industrial Solvent
Vinyl Chloride
Ingredient of PVC
It's plausible ... but the evidence says not.
It took decades of cigarette smoking by millions of Americans before the links between tobacco and lung cancer and other lung diseases were shown.
Millions of Americans have smoked marijuana over the past several decades.
>>Probably some government studies.<<
Probably?
PROBABLY?!!!
I have been wasting my time here.
Good day.