Cancer due to abnormal cell division ie mutation. Mutation happens all the time but in most cases our body immune system can deactivate the rogue cells. Cancer happens when the immune system is overwhelmed and can't shut down the rogue cells in time. Thus you can get cancer when your immune system is weak/compromised or you have large number of mutation occurring ie exposure to carcinogen. To avoid cancer adopt healthy lifestyle. Don't assume you know what this involves it is nothing of the cliche stuff. Secondly be aware of possible carcinogen. Eg there is a strain of e coli that can mutate cells and this strain has been increasingly found in feed lot cattle vs pasture fed.

Smoking will put you at risk of lung cancer because the cig smoke contains carcinogens. But there are other carcinogens that can cause lung cancer like asbestos/pesticides/mould. The critical factor is exposure. Overexposure and your immune system overload cancer can result. Some heavy smokers don't end up with cancer cos they are lucky or strong immune system. Also there is an element of probability in getting cancer.

Let me share a true story. My mum pass away from cancer relapse(but actual cause was septicaemia due to doc negligence). Anyway she was 4 yrs in remission after which docs found it spread to her chest, brain. They knew this case cannot save yet continue to treat her albeit with low priority that's why she pass away due to their carelessness. But before she passed away my father went to buy durian a for her I think it was musang King and strangely the seller warned him not to give it to anyone suffering from cancer. After her death I personally met few people who describe the same connection between musang King and cancer. What's the connection. I think its got to do with growth stimulants used to grow musang King and get harvest years earlier. If you understand cancer cells they are aggressive growers ie they will hijack your body resources in order to rapidly multiply. And this also includes any substance that boosts cell multiplication. This actually the basis on which chemotherapy works it targets the rapidly growing cancer cells. In a nutshell if you consume food that contains growth enhancers or boosters you are increasing your risk of cancer.

No end to discussing cancer but here goes. If the trend for kidney cancer is recent then we need to look what has affected and changed the water quality in the corresponding period. Also is this specific to a location as seen in Erin Brokovich. In Kampar there is a bastard factory processing Lime related products located upstream to the water treatment plant and it is polluting the tap water. Even the lawn dies if you water it. Then there is the numerous palm oil mill and their famous discharging of effluent into rivers supposedly after treating it. Really? Or do they just pay bribes? Johor Bahru has one of the most biologically polluted waters in the whole country. Why? Because all the farms producing for Sing are dumping effluent into sg johor. Ie chicken, cattle, vege etc. But there may be other causes. There is an increase in use of illegal preservatives in fresh food due to cost pressure on traders. WHO has labelled formalin as carcinogen responsible for throat and blood cancers.

Go tell that to the durian seller and the many others who share the same experience. I am looking at the similar trend and try to derive a logical explanation. Are you in touch with latest research on behaviour on cancer cell behaviour? Educate yourself before you jump to conclusion.