'Human Activity' Blamed for Fish Ills
http://www.washingtonpost.com/wp-dyn/content/article/2008/02/07/AR2008020702112.html
02/08/2008
That finding, announced today, does not pinpoint the pollutant that is causing the "intersex" condition. It also does not answer questions about whether the abnormal fish indicate a threat to human health, as the Potomac is a major source of drinking water for the area.
The most likely culprits are most probably xeno-oestrogens leeching into the water from plastics and pesticides. It's not just fish having a hard time either - the whole animal world is seeing huge increases in gender and sexual variance due to our interference.