爱荷华州的一项研究将农场排水与癌症的增加联系在一起. Iowa study links farm runoff to rising cancer rates.

美国的环境委员会和德雷克大学的一份新报告将北鱼河中高酸盐含量与爱荷华州癌症发病率上升联系在一起. A new report from Drake University and the Iowa Environmental Council links high nitrate levels in the North Raccoon River to rising cancer rates in Iowa. 调查发现,如果脏癌症的水平低于联邦标准, 就会增加膀癌, 前列腺癌和甲状腺癌的风险. The study finds increased risks for bladder, kidney, prostate, and thyroid cancers at levels below federal standards, attributing the contamination largely to farming and tile drainage. 尽管农业利益反对, 但报告敦促强制执行污染限制以保护公共健康. Despite opposition from agricultural interests, the report urges enforceable pollution limits to protect public health.