What Happens to Fish When Our Pills Reach the Water?

Podcast: How To Protect The Ocean · Andrew Lewin

Opublikowano: 2026-09-30

In 2001, government scientists started adding a tiny amount of the synthetic estrogen found in birth control pills to a remote lake in northwestern Ontario, at levels already measured in city wastewater. Within seven weeks, male fish were making egg-yolk protein. After two summers, some had eggs growing in their testes, and the fathead minnow population collapsed to about 1% of normal. Andrew explains how the same chemistry leaves our bodies every day, passes through treatment plants built for sewage and bacteria, and flows into rivers, lakes, and the coast. Hormones are only part of it. In Sweden, researchers...