US Navy limits 'whale-harming' sonar in Pacific

The US Navy has agreed to limit its use of sonar that may inadvertently harm whales and dolphins in waters near Hawaii and California. A federal judge in Honolulu signed the deal between the Navy and environmental groups on Monday. It restricts or bans the use of mid-frequency active sonar and explosives used in training exercises. Campaigners say that sonar disrupts the feeding of marine mammals, and can even cause deafness or death.
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