Is American hydropower in jeopardy?
The visible signs of America’s lingering drought are obvious at reservoirs across the American West. Drive from Las Vegas and step out of your car at Hoover Dam and Lake Mead in Nevada or peek out at Lake Powell on the Arizona-Utah border, and you’ll see the stone-stained “bathtub rings” indicating the high-water marks of better times. … [A]s water levels drop, the unseen effect of these drastic reservoir declines is that hydroelectric power is decreasing.