1.One of my close relative a lady of 60+ years developed cancer lung with no smoking history during 2008.Her husband is also not a smoker.I have analyzed the cause of the same and found out that the kitchen where she was cooking was very small and the air circulation was insignificant and not adequate. So, inhaling the residues of the cooking gas is a possibility as a "nano toxicity". I have put my idea in my book on "Nanotechnology" published by MJP Publishers, Chennai, India-2008. Later there was an article which I read in the New Indian Express- Sunday magazine also points to the same. Since with my limited source for research, I have come to the theoretical conclusion and made a hypothesis on the same. But I think a detailed analysis on the same will help a lot of people from getting cancer lung out of cooking gas in India.2. XVI International Cancer Congress New Delhi, India-1994-Hot coffee can produce changes akin to Leukoplakia in palate and pharyngeal region.Hot coffee cannot be tolerated by thumb dip(1974-BMJ) -then how about the mucous membrane of the mouth?Presented by Dr.S.Shanmugam,M.D3.One of my relative developed Hodgkin's disease in 1977, when I started my House surgeoncy.On analysis it looks like that she was feeding the cows with oil cakes especially the pea nut(ground nut).Since peanuts are more prone for infection with certain fungus called Aflatoxins which was implicated in Liver cancer-could it be a culprit was my view.4.One of my relative developed Cancer Larynx who had the habit of snuff usage. Snuff is supposed to contain uranium traces as per research report from USA. 5.A vaccine for cancer called injecting a chemo and creating an ulcer in the arm have controlled Hodgkin as well as cancer stomach and presented the same in surgeons conference in 1990.This is similar to the treatment discussed in Homeo medicine and can be explained by "nano" means.6. Chronic cervicitis due to poor menstrual hygiene due to usage of cloth instead of napkins is responsible for Cancer cervix in India- is my observation.Lot more is available for discussion.If some support comes, I can do lot of research on Cancer causes as well as treatment and guide other people who are interested considering my age(60).