The shellfish industry on the West Coast has had a bumpy few years and increasingly, it is pointing to climate change as the cause. Scientists believe the oceans are becoming more acidic as they absorb the increasing amounts of carbon dioxide in the air, and they are not sure if oysters and other shellfish will be able to adapt to this change. Lauren Sommer, from member station KQED, has this report.
LAUREN SOMMER, BYLINE: Terry Sawyer does a brisk business in oysters.
Nothing goes better with a turkey sandwich than a full day of college football. The season is winding down. There's a lot at stake as teams look ahead to bowl games and to the national title. Thanksgiving weekend brings about some of the great rivalries in college football. And here to give us a preview of the weekend is Chris Dufresne, who covers college football for the L.A. Times.
Scientists who study forests say they've discovered something disturbing about the way prolonged drought affects trees.
It has to do with the way trees drink. They don't do it the way we do — they suck water up from the ground all the way to their leaves, through a bundle of channels in a part of the trunk called the xylem. The bundles are like blood vessels.
When drought dries out the soil, a tree has to suck harder. And that can actually be dangerous, because sucking harder increases the risk of drawing air bubbles into the tree's plumbing.