Human actions are destroying Earth's oceans: what can we do about it?

Discovery's Planet Green teamed up with the NRDC to explore such questions in the documentary "Acid Test," hosted by Sigourney Weaver. "Acid Test" premieres tonight at 10:30 EDT as part of Planet Green's Blue August series.

Watch a sneak preview below and click here to read more about the film's coverage of the threat of ocean acidification.