Sonar Harmful to Marine Life

This month the Natural Resources Defense Council reported that sonar from military training, industry and shipping threatens whales, dolphins, fish and other marine species. Whales suspected of having been exposed to sonar were found to have bleeding in the brains and ears, as well as lesions in their livers and kidneys. A leading theory suggests that the mammals suffer from the bends; sonar causes them to panic and surface or descend too quickly, causing nitrogen bubbles to form in their blood.

Full Report in PDF Adobe Acrobat file (size: 2.4 mb)