Have Earth's vibrant waterways - its streams, rivers, estuaries and even oceans - become delivery systems for invisible poisons?
General Note
Originally released by National Geographic, 2004.
Streaming video file encoded with permission for digital streaming by Infobase on April 07, 2015.
Content Note
Unhealthy Waters (7:01); --Herbicides and Amphibian Populations (5:57); -- From Marshes to Rivers (4:18); -- Chemical Mixtures (3:20); -- Threat to Human Animals (6:50); -- Plants as Natural Allies Against Toxins (5:52); -- Toxic Farm Run-Off (6:54); -- Natural Solutions to Chemical Problems (3:09); -- Ocean Fish and Toxins from Land (7:35); .