You should probably start thinking about all the medications you take and the chemicals they put in your food and water. I'd also take note of the antibiotics and hormones they put into the beef, chicken and pork you buy. Or you could start worrying about the mercury that is in the fish you buy. Also, the microwave gives off radiation that can in turn give you cancer. What about the air you breathe? I'd bet you that it has more toxins in it than marijuana smoke! And you breath it in all day! Oh and, what about the fruit and veggies you eat? It's sprayed with poison! mmmm yummy! What about the mold thats in you air in your house? I'm pretty sure that is more toxic than marijuana smoke. And if you don't have any mold (which is highly unlikely) you've probably got a huge amount of Radon in your house! Which is radioactive and causes cancer, and a whole bunch of other diseases!