1. Those are mainly found in cigarettes, not pipe tobacco.
According to which studies? I have found no useful information on differences in content between tobacco in cigarettes and tobacco sold for pipe smoking (or chewing I suppose). If this packaged tobacco is so harmless and organic (in the food-organic sense, not the chemical-organic sense), how is it that people who chew tobacco are at such high risk of mouth cancer?
2. Pipe smoke should not be inhaled.
Okay. I did look at a bit of information about pipe smoking when I first saw this thread, and I saw that recommendation everywhere, but I can't fathom how it works. Can someone explain this to me because obviously I've never smoked a pipe.
There's the pipe. There's the tobacco in the pipe. And it's burning. So there's smoke coming out of the pipe, and that smoke goes into your mouth, and into the air in the room?
So the pipe smoker breathes in, holds his breath, puts the pipe in his mouth, lets smoke collect for a while, then breathes it all out? Or the pipe smoker puts the pipe in his mouth, puffs (isn't that inhaling a little?), lets the smoke collect without actively closing off the airway, and then breathes it out eventually? That second method doesn't seem to me like it can be called "not inhaling". More like "not inhaling deeply". Because not inhaling means literally holding your breath while the pipe is in your mouth, otherwise some smoke is going to get into your lungs.
Not to mention that there will be tobacco smoke in the air. Not to mention that some stuff in the smoke can be absorbed through mucus membranes.
After all that, what's the appeal? The dilute smell of tobacco smoke in the air? The taste of... what? Can you taste the smoke in your mouth? The nicotine high?
3. Either you live far out in the country, are entirely ignorant of the air composition in major cities, or wear a gas mask every time you leave your clean room.
Really? Those are the only choices?