Understanding the History Behind California's Drought - Lynn Ingram

California is in the middle of the worst drought in 500 years. Paleo-climatologist Lynn Ingram at California UC Berkley studies tree rings and soil samples to investigate past drought conditions. The worst was back in 1580. Her findings show that the 20th century was wetter than average, and that the climate is now shifting back to drier conditions. Smaller communities could run dry as population and development continues to grow. Water awareness is needed to mitigate current and future problems.