True, my grandma never smoked, she didnt even allow smoking while she is around, but still got lung cancer.
Yep, a lot of that is related to food, tbh even though food regulations are tough in the better parts of the world, a lot of farmers and agriculture engineers do stuff they arent allowed to do, especially in the 3rd world countries (which are the biggest food producers in the world). Even in Europe, its not allowed to use antibiotics as pesticides, but a lot of engineers still do it. And, food regulations are much different in the different parts of the world. European regulations are much more strict comparing to the ones in the US. USA has some pretty fucked up pesticides regulations.
And GMO isnt allowed in Europia.
Japan has a way smaller cancer rate than US, even though most crops are GMO.
But Japan doesnt use a lot of sugar or HSFC, even in the processed food, they use stevia since 70s instead which is a plant that causes no harm. And their diet is low fat. Funny, cause japs invented HSFC but refuse to use it in their own food.
On the other hand, processed food in western countries is full of HSFC and transfats in everything, its cheaper than sugar, doesnt change the taste of food, and its literally every where. Just recently, scientists have been talking about it, and how our processed food is fucked up.
People usually get shocked when they find out im on a diet and fry food in pork fat and eat bacon but refuse to eat diet, low cal cookies, and still losing weight.