With cancer, it’s exceedingly difficult to narrow down a cause unless someone was a smoker or was otherwise exposed to a very potent carcinogen or to abnormal a

With cancer, it’s exceedingly difficult to narrow down a cause unless someone was a smoker or was otherwise exposed to a very potent carcinogen or to abnormal amounts of radiation. Every day, humans are exposed to a variety of chemicals, metals, pollutants, and so on. For things that are suddenly increasing, we’d need hard and unbiased information about every common product, all nearby sources of pollution, everything in a persons normal diet, and so on. It isn’t easy.