Upland erosion and the sedimentation in downstream areas are major causes of reduced water quality and habitat destruction in most mid-western rivers and streams.
(Upland erosion and the sedimentation in downstream areas; are; major causes of reduced water quality and habitat destruction in most mid-western rivers and streams)
Upland erosion and the sedimentation in downstream areas
are
major causes of reduced water quality and habitat destruction in most mid-western rivers and streams