here we at least find some links to peer reviewed papers...
http://www.cancerresearchuk.org/can...e/tobacco-smoking-and-cancer-the-evidence#Ref 1
Chemicals in tobacco smoke can damage the body in many ways
Chemicals found in tobacco smoke can damage DNA
1,
11,
37. For example, studies have shown that benzo(a)pyrene damages a gene called p53 that normally protects our cells from cancer
37, 38. While polonium-210 becomes concentrated in hotspots in smokers’ airways, subjecting them to very high doses of high-energy alpha-radiation that damages the DNA of nearby cells
39.
The cocktail of chemicals in tobacco smoke is even more dangerous as a mix. Toxic metals found in tobacco smoke, like cadmium, arsenic, and lead, stop our cells from repairing DNA damage
40. This worsens the effects of chemicals like benzo(a)pyrene that damage DNA and makes it even more likely that damaged cells will eventually turn cancerous.
Many tobacco poisons disable the cleaning system that our bodies use to remove toxins. Some substances including formaldehyde and acrolein kill cilia, tiny hairs in our airways that help to clear away toxins
37.
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I have been asking you for links to peer reviewed papers. (or nasa experiments)
you have not been able to produce any... or any science for that.