in Oxford Research Encyclopedia of Environmental Science
P ublished online September 2017 .
Article. Subjects: Pollution and Threats to the Environment (Social Science); Ecology and Conservation; Environmental Science, Engineering, and Technology; Environmental History. 10360 words.
The Mississippi River, the longest in North America, is really two rivers geophysically. The volume is less, the slope steeper, the velocity greater, and the channel straighter in its upper...