Millions of people in the world have been exposed to arsenic through contamination of drinking water.  Arsenic can cause a higher risk of cancers, including lung cancer, bladder cancer, and skin cancer.

Many people grew up in countries other than the United States. C. Steinmaus and co-authors (Cancer Epidemiology Biomarkers and Prevention 2013, Volume 22, Page 623), reported on studies of patients who lived in Northern Chile.  Since over a quarter million people were exposed…

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