How much does cost to build a seaport?

Who explored the st. Lawerence river? Is an ocean a sea but a sea? What are some reasons why a river may lose energy? Why is a car bad for the ocean? What catalog card do you use to find a book by William Thompson of the everglades? What president had an alligator for a pet? What enables a swimmer to float even though his body uncontrolled sink in water? What percentage of sunlight reaches the understory? Why did pike leaves St. Louis travel southward to the rocky mountains? Where is Huang hu river? What is a theme park? How has the concept of the Colosseum been reflected in today's western society? When an oxbow becomes completely cut off from the main river it is called a what? What is the difference between a bailey and a treadway bridge? How many palm trees are being cut down? What is a small part of an ocean called? Do seals live longer in the zoo or in the wild? What are the 4 parts of the ocean floor? When was Einstein on the Beach created? One of worlds longest rivers begins with n?