http://abcnews.go.com/sections/nightline/DailyNews/marin_breast_cancer020804 .html Exerpted from: Why Does Marin County, Calif., Have Such a High Breast Cancer Rate? By Judy Muller Aug. 4 — Marin County, Calif., just across the bay from San Francisco, is considered an extremely desirable place to live. It boasts pristine woodlands, beautiful waterways and, with Mount Tamalpais as a stunning backdrop, some very pricey real estate. Marin's population is predominantly white, affluent, highly educated and very health-conscious. "I try to eat organic foods as much as I can," said Lynn Oberlander, a local resident. "I try to get my stress level down. I go to yoga. And I hike and I exercise." But despite all the advantages, Marin County has the highest rate of breast cancer in America, possibly even in the world.