That's an easy one to answer.... First off, I researched what a few head scientists (Molecular Biologists) some years back said in regards to their discoveries in the radiation given off my
tobacco smoke. It's similar to the x rays given off by chest x rays. Over long periods of time, it eventually causes the genetic trigger to be flipped and the cells to turn cancerous. The experts stated that it is not a question of if you will get lung cancer but that it is
almost guaranteed you will develop it if given enough time and exposure. Of course, this isn't even counting all of the other carcinogens found in tar.
I smoked for many years myself..... I lost my Mother to lung cancer awhile back and that wasn't fun...She was also a smoker for many years, not that it means much. But what does mean a lot is not just what researchers have discovered in regards to smoking, but also in the pure numbers of non smoker vs. smokers who contract lung cancer. In my entire life, I have only witnessed one person that contracted lung cancer than did not smoke. All of the rest of the people who I have known that have gotten lung cancer (which has been quite a few) were all smokers. This in itself ought to tell you something. Or at least it would for anyone with common
sense.
Ask any Pathologist about lung cancer and you will quickly be informed that there are several types of lung cancer (none good to get) and each different type is associated with different causation's. Yes, most all cancers have a genetic component to them. But it is well known that smoking often triggers those genetic weaknesses.
We all know people who seem to smoke for many years but never die from it. But, it must be realized that these types of people are the extreme exceptions. How many people do you know that smoked for 70 years that are still alive to tell you about it? How about 60 years? I bet you can't name many because the simple fact of the matter is that people who smoke that long usually die from either lung cancer or other smoking related health issues. Most people I have seen that make it to 50 years of smoking are usually the ones I have noticed that get lung cancer.
You can't argue with the math....More smokers get lung cancer than non smokers...just a fact.
Why are all you ex smoking vapers on this forum not still smoking if you think it is so healthy? The reason why is because deep down most of you KNOW it is not good for you, especially the lungs.