John W. Jenson, Ph.D., is Director of the Water & Environmental Research Institute of the Western Pacific, Chief Hydrogeologist and Professor of Environmental Geology at the University of Guam. With Thanksgiving only a few days away, I’ve been thinking about how good we’ve got it. My parents were members of the Great Generation that grew up during the Great Depression and started their adult lives during World War II. Dad grew up on a sheep ranch in a mountain valley of Idaho, elevation 6,000 feet, with mountains on both sides rising to…