Penguins a Barometer for Ocean Health

The world’s oceans are under assault. The increasing concentration of global carbon emissions is making waters warmer and more acidic, which is harming coral reefs, home to about one-third of everything that lives in the sea. One barometer of ocean health is the penguin, whose Southern Hemisphere range extends from the tropical Galapagos Islands near the equator to the ice shelf of Antarctica. VOA's Rosanne Skirble reports on their struggle for survival in the face of numerous threats.