Recent research has shown that sonar, especially the kind the U. S. Navy uses to detect submarines, may be harming whales, porpoises and dolphins who rely on their own sonar to navigate and communicate. The European Parliament has called for a moratorium on the kind of sonar that is thought to be harmful and for research to find alternatives. Meanwhile, a U. S. federal appeals court turned down a suit called The Cetacean Community v. George W. Bush saying that whales and other cetaceans have no standing to sue for relief from the damaging effects of sonar.
This article explains how the damage is done.
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