RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…
1,691 followers
833 followers
RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…
1,217 followers
RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…
1,440 followers
RT @USGS: Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the USGS National Wa…