Nitrate contamination as a cause of the high incidence of esophagus cancer at Linzhou Anyang, Henan province, P.R.China

摘要

Four characteristics of esophagus cancer in Linzhou are discussed. 46 samples of drinking water were analyzed. The geographical distributions of NO_3~- and esophagus cancer are closely correlated with each other, suggesting that the excessive content of NO_3~- in drinking water is one of the important causes of esophagus cancer. Since the 1970's, excessive application of chemical fertilizers has caused the contamination of NO_3~- in drinking water. We propose that five measures must be taken: prevent the mildew, move the amine, use the fertilizer of Mo, treat the hyperplasia, change the bad habits of drinking and eating, particularly manage the drinking water.