A USGS scientist prepares a tracer solution in a gas-tight bladder
(Public domain.)
Detailed Description
A USGS scientist prepares a tracer solution in a gas-tight bladder that will be pumped into a zone of nitrate-containing groundwater to monitor the production and consumption of nitric oxide dissolved in groundwater.
Details
Image Dimensions: 1606 x 1452
Date Taken:
Location Taken: US
Credits
U.S. Geological Survey