WEBVTT FILE 1 00:00:00.070 --> 00:00:04.260 In the western United States, a long drought reduced mountain snowpack 2 00:00:04.260 --> 00:00:08.380 and river flows, causing heavy reliance on aquifers for crop irrigation 3 00:00:08.380 --> 00:00:12.460 and severe depletion of freshwater resources. 4 00:00:12.460 --> 00:00:16.570 Precipitation measurements together with GRACE data show how 5 00:00:16.570 --> 00:00:20.580 natural variations in the weather and unsustainable rates of water use 6 00:00:20.580 --> 00:00:23.707 conspired to deplete groundwater in California.