It is a slow poison. Symptoms appear after continuous ingestion over five to 12 years. Ashok Ghosh More Quotes by Ashok Ghosh More Quotes From Ashok Ghosh When I joined the cancer hospital, I started checking blood, hair and nail samples of cancer patients and found they have very clear-cut symptoms of arsenic poisoning, i saw 6 and 7-year-old children coming with cancer. These children don't chew tobacco or smoke. It was very disturbing, and I could not sleep. Slowly, I adjusted. Ashok Ghosh health-news The cause of the upsurge in arsenic concentration is the overuse of groundwater for irrigation and drinking, which happens when withdrawal rates exceed recharge rate, there is no law here to check excessive groundwater withdrawal. Ashok Ghosh health-news