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Progress Watch How humpback whales made a global comeback

As international whaling ramped up around the turn of the 20th century so did efforts by governments, activists, and the public to stop the practice. By 2016, more than half of the species' 14 population segments were no longer considered endangered.

Nick Ut/AP

When the Pacific Whale Foundation (PWF) was founded in 1980, its researchers would drive up and down the coast of Hawaii waiting to see a whale. At that time, only a few hundred humpback whales made it to the islands per year. Now, more than 10,000 do. 

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