drought

California is pumping water that fell to Earth 20,000 years ago

By now, the impacts of California‚Äôs unchecked groundwater pumping are well-known: the dropping water levels, dried-up wells and slowly sinking farmland in parts of the Central Valley. But another consequence gets less attention, one measured not by acre-feet or gallons-per-minute but the long march of time. As California farms and cities drill deeper for groundwater in an era of drought …