LOS ANGELES, Calif. — Southern California, including the Inland Empire, continues to have the nation’s worst air pollution and ranks fourth in short-term particle pollution and annual particle pollution, the American Lung Association said today.

You walk into a fast food restaurant and examine the menu. You could get a salad with grilled chicken and dressing on the side. Or you could get a double cheeseburger.

Seeing the calories listed next to each item isn’t likely to affect your decision, according to a new study being presented at the Experimental Biology 2013 meeting this week. But seeing the amount of time it would take you to work those calories off at the gym just might.

The study