A water quality specialist in South Dakota notices local streams in a region have high salinity levels. The inland streams are not connected to any wetland, only a local watershed from a mountain region.

Which of the following is a possible source of the extra salt in the stream?

- Ocean upstream
- Lake downstream
- Nearby fracking
- Pump jack drills

Given what we know about the processes mentioned, we can confirm that a possible source for the extra salt in the stream is Nearby Fracking.

Fracking is a highly controversial process in which highly pressurized water is used for drilling. It is often used to mine natural gas and oil. The controversy lies within its high environmental cost.

The environmental cost factor lies in the use of massive amounts of water and its further contamination of nearby water sources due to the chemicals released during this process.

This, coupled with the fact that the water source in question is stated to not be connected to any form of wetland leads us to the conclusion that the most likely source of extra salt in the stream is nearby fracking.

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