date:Jun 07, 2012
nerate estrogenic hormones that are excreted in urine and feces, said ISTC senior research scientist Wei Zheng, who led the study. In large confined animal feeding operations (CAFOs) the hormones end up in wastewater. Farmers often store the wastewater in lagoons and may use it to fertilise crops.
Federal laws regulate the flow of nutrients such as nitrogen and phosphorous from CAFOs to prevent excess nutrients from polluting rivers, streams, lakes or groundwater. Environmental officials assume