Deafeningly loud sonar is a proven danger to marine life, but its use throughout the world's oceans is spreading.

This powerful movie, brought to you by the Natural Resources Defense Council and narrated by Pierce Brosnan, shows what sonar does to whales caught within its range, and explains how whales, dolphins and other marine animals can be protected from deadly sonar. www.nrdc.org/wildlife/marine/

Category: Pets & Animals