Rising levels of carbon dioxide are corroding the world's seas. It’s called ocean acidification, and it’s already threatening Northwest oyster beds.
Scientists think the impact of ocean acidification is happening much more rapidly than previously thought.
The Seattle Times has published a major print and online series on its impacts called "Sea Change: The Pacific’s Perilous Turn" by reporter Craig Welch and photographer Steve Ringman. Craig Welch talks with Ross Reynolds.