What interferes with river flow?

Which humans activity has the most negative effect on the stability of an ocean environment? What action is recommended when somebody calls you to inquire about your work environment or specfic account information? Does New York state have a state dessert? Which mountain is older the Rocky Mountains or the laurentian mountains? How much more salty is the Mediterranean Sea than the Atlantic? What are natural resources in the indus river valley? Where did Pacific islanders come from? What country did the Kalahari goat originate from? Why will a boat float higher in the Atlantic ocean rather than the person Potomac? Name the five Great Lakes in the United states? What body of water in Southwest Asia sits atop the world's largest known petroleum reserves? How many degrees southwest is the Leaning Tower of Pisa leaning? How much does an apartment in Times Square cost? How did Mount Everest impact society? Is there a Kosher restaurant in the vicinity of the Javits Center in New York City? How do you measure the water level in the Nile? What are drainage outlets? How was the Sistine Chapel ceiling painted? What bodies of water separate Africa from the Arabian peninsula? How did the fox river in Wisconsin get its name?