RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…
1,693 followers
810 followers
RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…
1,241 followers
RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…
1,390 followers
RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…