First let me say that tobacco is addictive and also very difficult to stop once you have started its use these days. It is currently an extremely expensive habit in the United States and may cost a ridiculous $280 per month. And for contrast that is about the cost of groceries for some people. And all it really is, is a leave of herb plant packaged into items for sale. I don't know about most people, but I can get a whole head of lettuce for about $1.50. 
12.3 Chemicals and contaminants in tobacco products - Tobacco in Australia
From the story:
"Polyphenols found in tobacco include rutin, "C h l o r o g e n i c" acid, caffeic acid and scopoletin. Tobacco plants also contain toxic metals. Cadmium and lead are found at relatively high levels in tobacco leaves because the plants readily absorb them from soil."
So I wondered are any of those items they found in tobacco leaves carcinogen and why?
I did the analysis of radiation as a cancer causing element and found that at high enough energies it certainly was. But I just wasn't sure which chemical compounds could actually be a strong enough chemical to bind with DNA molecules and either rip them out entirely or snatch one away while another replaces it. That could be the science of the molecular bond energy of the DNA double helix structure.

12.3 Chemicals and contaminants in tobacco products - Tobacco in Australia
From the story:
"Polyphenols found in tobacco include rutin, "C h l o r o g e n i c" acid, caffeic acid and scopoletin. Tobacco plants also contain toxic metals. Cadmium and lead are found at relatively high levels in tobacco leaves because the plants readily absorb them from soil."
So I wondered are any of those items they found in tobacco leaves carcinogen and why?
I did the analysis of radiation as a cancer causing element and found that at high enough energies it certainly was. But I just wasn't sure which chemical compounds could actually be a strong enough chemical to bind with DNA molecules and either rip them out entirely or snatch one away while another replaces it. That could be the science of the molecular bond energy of the DNA double helix structure.